diff --git a/validation/src/check.rs b/validation/src/check.rs
index 5821148..e17540c 100644
--- a/validation/src/check.rs
+++ b/validation/src/check.rs
@@ -133,11 +133,11 @@ impl std::str::FromStr for Wormhole{
 }
 
 #[derive(Default)]
-struct Counts{
-	mode_start_counts:HashMap<ModeID,u64>,
-	mode_finish_counts:HashMap<ModeID,u64>,
-	mode_anticheat_counts:HashMap<ModeID,u64>,
-	teleport_counts:HashMap<SpawnID,u64>,
+struct Counts<'a>{
+	mode_start_counts:HashMap<ModeID,Vec<&'a str>>,
+	mode_finish_counts:HashMap<ModeID,Vec<&'a str>>,
+	mode_anticheat_counts:HashMap<ModeID,Vec<&'a str>>,
+	teleport_counts:HashMap<SpawnID,Vec<&'a str>>,
 	spawn_counts:HashMap<SpawnID,u64>,
 	wormhole_in_counts:HashMap<WormholeID,u64>,
 	wormhole_out_counts:HashMap<WormholeID,u64>,
@@ -147,7 +147,7 @@ pub struct ModelInfo<'a>{
 	model_class:&'a str,
 	model_name:&'a str,
 	map_info:MapInfo<'a>,
-	counts:Counts,
+	counts:Counts<'a>,
 }
 
 pub fn get_model_info<'a>(dom:&'a rbx_dom_weak::WeakDom,model_instance:&'a rbx_dom_weak::Instance)->ModelInfo<'a>{
@@ -160,14 +160,14 @@ pub fn get_model_info<'a>(dom:&'a rbx_dom_weak::WeakDom,model_instance:&'a rbx_d
 		if class_is_a(instance.class.as_str(),"BasePart"){
 			// Zones
 			match instance.name.parse(){
-				Ok(Zone::Start(mode_id))=>*counts.mode_start_counts.entry(mode_id).or_insert(0)+=1,
-				Ok(Zone::Finish(mode_id))=>*counts.mode_finish_counts.entry(mode_id).or_insert(0)+=1,
-				Ok(Zone::Anticheat(mode_id))=>*counts.mode_anticheat_counts.entry(mode_id).or_insert(0)+=1,
+				Ok(Zone::Start(mode_id))=>counts.mode_start_counts.entry(mode_id).or_default().push(instance.name.as_str()),
+				Ok(Zone::Finish(mode_id))=>counts.mode_finish_counts.entry(mode_id).or_default().push(instance.name.as_str()),
+				Ok(Zone::Anticheat(mode_id))=>counts.mode_anticheat_counts.entry(mode_id).or_default().push(instance.name.as_str()),
 				Err(_)=>(),
 			}
 			// Spawns & Teleports
 			match instance.name.parse(){
-				Ok(SpawnTeleport::Teleport(spawn_id))=>*counts.teleport_counts.entry(spawn_id).or_insert(0)+=1,
+				Ok(SpawnTeleport::Teleport(spawn_id))=>counts.teleport_counts.entry(spawn_id).or_default().push(instance.name.as_str()),
 				Ok(SpawnTeleport::Spawn(spawn_id))=>*counts.spawn_counts.entry(spawn_id).or_insert(0)+=1,
 				Err(_)=>(),
 			}
@@ -224,13 +224,13 @@ fn check_empty(value:&str)->Result<&str,StringEmpty>{
 }
 
 // check for duplicate objects
-pub struct DuplicateCheckContext<ID>(HashMap<ID,u64>);
-pub struct DuplicateCheck<ID>(Result<(),DuplicateCheckContext<ID>>);
-impl<ID> DuplicateCheckContext<ID>{
-	fn check(self)->DuplicateCheck<ID>{
+pub struct DuplicateCheckContext<ID,T>(HashMap<ID,T>);
+pub struct DuplicateCheck<ID,T>(Result<(),DuplicateCheckContext<ID,T>>);
+impl<ID,T> DuplicateCheckContext<ID,T>{
+	fn check(self,f:impl Fn(&T)->bool)->DuplicateCheck<ID,T>{
 		let Self(mut set)=self;
 		// remove correct entries
-		set.retain(|_,&mut c|c!=1);
+		set.retain(|_,c|f(c));
 		// if any entries remain, they are incorrect
 		if set.is_empty(){
 			DuplicateCheck(Ok(()))
@@ -241,23 +241,23 @@ impl<ID> DuplicateCheckContext<ID>{
 }
 
 // check that there is at least one matching item for each item in a reference set, and no extra items
-pub struct SetDifferenceCheckContextAllowNone<ID>{
-	extra:HashMap<ID,u64>,
+pub struct SetDifferenceCheckContextAllowNone<ID,T>{
+	extra:HashMap<ID,T>,
 }
-pub struct SetDifferenceCheckContextAtLeastOne<ID>{
-	extra:HashMap<ID,u64>,
+pub struct SetDifferenceCheckContextAtLeastOne<ID,T>{
+	extra:HashMap<ID,T>,
 	missing:HashSet<ID>,
 }
 pub struct SetDifferenceCheck<Context>(Result<(),Context>);
-impl<ID> SetDifferenceCheckContextAllowNone<ID>{
-	fn new(initial_set:HashMap<ID,u64>)->Self{
+impl<ID,T> SetDifferenceCheckContextAllowNone<ID,T>{
+	fn new(initial_set:HashMap<ID,T>)->Self{
 		Self{
 			extra:initial_set,
 		}
 	}
 }
-impl<ID:Eq+std::hash::Hash> SetDifferenceCheckContextAllowNone<ID>{
-	fn check<T>(mut self,reference_set:&HashMap<ID,T>)->SetDifferenceCheck<Self>{
+impl<ID:Eq+std::hash::Hash,T> SetDifferenceCheckContextAllowNone<ID,T>{
+	fn check<U>(mut self,reference_set:&HashMap<ID,U>)->SetDifferenceCheck<Self>{
 		// remove correct entries
 		for (id,_) in reference_set{
 			self.extra.remove(id);
@@ -270,16 +270,16 @@ impl<ID:Eq+std::hash::Hash> SetDifferenceCheckContextAllowNone<ID>{
 		}
 	}
 }
-impl<ID> SetDifferenceCheckContextAtLeastOne<ID>{
-	fn new(initial_set:HashMap<ID,u64>)->Self{
+impl<ID,T> SetDifferenceCheckContextAtLeastOne<ID,T>{
+	fn new(initial_set:HashMap<ID,T>)->Self{
 		Self{
 			extra:initial_set,
 			missing:HashSet::new(),
 		}
 	}
 }
-impl<ID:Copy+Eq+std::hash::Hash> SetDifferenceCheckContextAtLeastOne<ID>{
-	fn check<T>(mut self,reference_set:&HashMap<ID,T>)->SetDifferenceCheck<Self>{
+impl<ID:Copy+Eq+std::hash::Hash,T> SetDifferenceCheckContextAtLeastOne<ID,T>{
+	fn check<U>(mut self,reference_set:&HashMap<ID,U>)->SetDifferenceCheck<Self>{
 		// remove correct entries
 		for (id,_) in reference_set{
 			if self.extra.remove(id).is_none(){
@@ -323,22 +323,22 @@ pub struct MapCheck<'a>{
 	// MapStart must exist
 	mapstart:Result<(),()>,
 	// No duplicate map starts (including bonuses)
-	mode_start_counts:DuplicateCheck<ModeID>,
+	mode_start_counts:DuplicateCheck<ModeID,Vec<&'a str>>,
 	// At least one finish zone for each start zone, and no finishes with no start
-	mode_finish_counts:SetDifferenceCheck<SetDifferenceCheckContextAtLeastOne<ModeID>>,
+	mode_finish_counts:SetDifferenceCheck<SetDifferenceCheckContextAtLeastOne<ModeID,Vec<&'a str>>>,
 	// Check for dangling MapAnticheat zones (no associated MapStart)
-	mode_anticheat_counts:SetDifferenceCheck<SetDifferenceCheckContextAllowNone<ModeID>>,
+	mode_anticheat_counts:SetDifferenceCheck<SetDifferenceCheckContextAllowNone<ModeID,Vec<&'a str>>>,
 	// Spawn1 must exist
 	spawn1:Result<(),()>,
 	// Check for dangling Teleport# (no associated Spawn#)
-	teleport_counts:SetDifferenceCheck<SetDifferenceCheckContextAllowNone<SpawnID>>,
+	teleport_counts:SetDifferenceCheck<SetDifferenceCheckContextAllowNone<SpawnID,Vec<&'a str>>>,
 	// No duplicate Spawn#
-	spawn_counts:DuplicateCheck<SpawnID>,
+	spawn_counts:DuplicateCheck<SpawnID,u64>,
 	// Check for dangling WormholeIn# (no associated WormholeOut#)
-	wormhole_in_counts:SetDifferenceCheck<SetDifferenceCheckContextAtLeastOne<WormholeID>>,
+	wormhole_in_counts:SetDifferenceCheck<SetDifferenceCheckContextAtLeastOne<WormholeID,u64>>,
 	// No duplicate WormholeOut# (duplicate WormholeIn# ok)
 	// No dangling WormholeOut#
-	wormhole_out_counts:DuplicateCheck<WormholeID>,
+	wormhole_out_counts:DuplicateCheck<WormholeID,u64>,
 }
 
 impl<'a> ModelInfo<'a>{
@@ -394,7 +394,7 @@ impl<'a> ModelInfo<'a>{
 			.check(&self.counts.mode_start_counts);
 
 		// There must be exactly one start zone for every mode in the map.
-		let mode_start_counts=DuplicateCheckContext(self.counts.mode_start_counts).check();
+		let mode_start_counts=DuplicateCheckContext(self.counts.mode_start_counts).check(|c|c.len()<=1);
 
 		// Check that there are no Teleports without a corresponding Spawn.
 		// Spawns are allowed to have 0 Teleports.
@@ -402,7 +402,7 @@ impl<'a> ModelInfo<'a>{
 			.check(&self.counts.spawn_counts);
 
 		// There must be exactly one of any perticular spawn id in the map.
-		let spawn_counts=DuplicateCheckContext(self.counts.spawn_counts).check();
+		let spawn_counts=DuplicateCheckContext(self.counts.spawn_counts).check(|&c|c<=1);
 
 		// Check that at least one WormholeIn exists for each WormholeOut.
 		// This also checks that there are no WormholeIn without a corresponding WormholeOut.
@@ -410,7 +410,7 @@ impl<'a> ModelInfo<'a>{
 			.check(&self.counts.wormhole_out_counts);
 
 		// There must be exactly one of any perticular wormhole out id in the map.
-		let wormhole_out_counts=DuplicateCheckContext(self.counts.wormhole_out_counts).check();
+		let wormhole_out_counts=DuplicateCheckContext(self.counts.wormhole_out_counts).check(|&c|c<=1);
 
 		MapCheck{
 			model_class,
@@ -516,9 +516,9 @@ impl<'a> std::fmt::Display for MapCheck<'a>{
 		}
 		if let DuplicateCheck(Err(DuplicateCheckContext(context)))=&self.mode_start_counts{
 			write!(f,"Duplicate start zones: ")?;
-			write_comma_separated(f,context.iter(),|f,(mode_id,count)|{
+			write_comma_separated(f,context.iter(),|f,(mode_id,names)|{
 				write_zone!(f,mode_id,"Start")?;
-				write!(f,"({count} duplicates)")?;
+				write!(f,"({} duplicates)",names.len())?;
 				Ok(())
 			})?;
 			writeln!(f,"")?;
@@ -527,7 +527,7 @@ impl<'a> std::fmt::Display for MapCheck<'a>{
 			if !context.extra.is_empty(){
 				let plural=if context.extra.len()==1{"zone"}else{"zones"};
 				write!(f,"Extra finish {plural} with no matching start zone: ")?;
-				write_comma_separated(f,context.extra.iter(),|f,(mode_id,_count)|
+				write_comma_separated(f,context.extra.iter(),|f,(mode_id,_names)|
 					write_zone!(f,mode_id,"Finish")
 				)?;
 				writeln!(f,"")?;
@@ -545,7 +545,7 @@ impl<'a> std::fmt::Display for MapCheck<'a>{
 			if !context.extra.is_empty(){
 				let plural=if context.extra.len()==1{"zone"}else{"zones"};
 				write!(f,"Extra anticheat {plural} with no matching start zone: ")?;
-				write_comma_separated(f,context.extra.iter(),|f,(mode_id,_count)|
+				write_comma_separated(f,context.extra.iter(),|f,(mode_id,_names)|
 					write_zone!(f,mode_id,"Anticheat")
 				)?;
 				writeln!(f,"")?;
@@ -555,13 +555,12 @@ impl<'a> std::fmt::Display for MapCheck<'a>{
 			writeln!(f,"Model has no Spawn1")?;
 		}
 		if let SetDifferenceCheck(Err(context))=&self.teleport_counts{
-			if !context.extra.is_empty(){
-				// TODO: include original names of objects in hashmap value as Vec<&str>
-				let plural=if context.extra.len()==1{"object"}else{"objects"};
+			for (_,names) in &context.extra{
+				let plural=if names.len()==1{"object"}else{"objects"};
 				write!(f,"Extra Spawn-type {plural} with no matching Spawn: ")?;
-				write_comma_separated(f,context.extra.iter(),|f,(SpawnID(spawn_id),_count)|
-					write!(f,"Teleport or Trigger or SpawnAt #{spawn_id}")
-				)?;
+				write_comma_separated(f,names.iter(),|f,&name|{
+					write!(f,"{name}")
+				})?;
 				writeln!(f,"")?;
 			}
 		}