diff --git a/mantle/delay.lua b/mantle/delay.lua
index fa06836..c7f41ac 100644
--- a/mantle/delay.lua
+++ b/mantle/delay.lua
@@ -32,13 +32,6 @@ local mt = { }
 local k_nt = { }
 
 
-local assignable =
-{
-	dpos   = true,
-	status = true,
-}
-
-
 --
 -- On accessing a nil index.
 --
@@ -60,12 +53,7 @@ mt.__newindex = function
 	k,  -- key value to assign to
 	v   -- value to assign
 )
-	if not assignable[ k ]
-	then
-		error( 'Cannot assign new key "' .. k .. '" to Delay' )
-	end
-
-	self[ k_nt ][ k ] = v
+	error( 'Cannot assign to Delay' )
 end
 
 
@@ -112,10 +100,35 @@ local function wait
 )
 	self[ k_nt ].status = 'wait'
 
-	self[ k_nt ].alarm = alarm
+	if alarm ~= nil then self[ k_nt ].alarm = alarm end
 end
 
 
+--
+-- Puts this delay as replacement on a queue.
+--
+local function replaceAt
+(
+	self,
+	queue,
+	dpos
+)
+	queue:replace( dpos, self )
+	self[ k_nt ].dpos = dpos
+end
+
+
+--
+-- Pushes this delay on a queue and remembers the position.
+--
+local function pushOn
+(
+	self,
+	queue
+)
+	self[ k_nt ].dpos = queue:push( nd )
+end
+
 --
 -- Creates a new delay.
 --
@@ -135,6 +148,8 @@ local function new
 		blockedBy = blockedBy,
 		setActive = setActive,
 		wait = wait,
+		replaceAt = replaceAt,
+		pushOn = pushOn,
 		[ k_nt ] =
 			{
 				etype = etype,
diff --git a/mantle/sync.lua b/mantle/sync.lua
index fe95547..ac199b1 100644
--- a/mantle/sync.lua
+++ b/mantle/sync.lua
@@ -59,7 +59,7 @@ local function removeDelay
 	then
 		for _, vd in pairs( delay.blocks )
 		do
-			vd.status = 'wait'
+			vd:wait( )
 		end
 	end
 end
@@ -364,7 +364,7 @@ local function delay
 
 		if #self.delays > 0 then stack( self.delays:last( ), nd ) end
 
-		nd.dpos = self.delays:push( nd )
+		nd:pushOn( self.delay )
 
 		recurse( )
 
@@ -389,17 +389,15 @@ local function delay
 			then
 				stack( od, nd )
 
-				nd.dpos = self.delays:push( nd )
+				nd:pushOn( self.delays)
 			elseif ac == 'toDelete,stack'
 			then
 				if od.status ~= 'active'
 				then
-					-- turns olddelay into a delete
+					-- turns old delay into a delete
 					local rd = Delay.new( 'Delete', self, od.alarm, od.path )
 
-					self.delays:replace( il, rd )
-
-					rd.dpos = il
+					rd:replaceAn( self.delays, il )
 
 					-- and stacks delay2
 					stack( rd, nd )
@@ -408,7 +406,7 @@ local function delay
 					stack( od, nd )
 				end
 
-				nd.dpos = self.delays:push( nd )
+				nd.pushOn( self.delays )
 			elseif ac == 'absorb'
 			then
 				-- nada
@@ -416,13 +414,11 @@ local function delay
 			then
 				if od.status ~= 'active'
 				then
-					self.delays:replace( il, nd )
-
-					nd.dpos = il
+					nd:replaceAt( self.delays, il )
 				else
 					stack( od, nd )
 
-					nd.dpos = self.delays:push( nd )
+					nd:pushOn( self.delays )
 				end
 			elseif ac == 'split'
 			then
@@ -449,7 +445,7 @@ local function delay
 	end
 
 	-- no block or combo
-	nd.dpos = self.delays:push( nd )
+	nd:pushOn( self.delays )
 
 	recurse( )
 end
@@ -472,10 +468,7 @@ local function getAlarm
 	-- finds the nearest delay waiting to be spawned
 	for _, d in self.delays:qpairs( )
 	do
-		if d.status == 'wait'
-		then
-			return d.alarm
-		end
+		if d.status == 'wait' then return d.alarm end
 	end
 
 	-- nothing to spawn
@@ -636,7 +629,7 @@ local function addBlanketDelay
 )
 	local newd = Delay.new( 'Blanket', self, true, '' )
 
-	newd.dpos = self.delays:push( newd )
+	newd:pushOn( self.delays:push( newd ) )
 
 	return newd
 end
@@ -652,7 +645,7 @@ local function addInitDelay
 )
 	local newd = Delay.new( 'Init', self, true, '' )
 
-	newd.dpos = self.delays:push( newd )
+	newd:pushOn( self.delays:push( newd ) )
 
 	return newd
 end