Turn y property into an offset relative to plasmid_y 
Turn y property into an offset relative to plasmid_y 

Where previously, it was absolute y coordinate.
UndeadBlow/giraffe,BjornFJohansson/giraffe,BjornFJohansson/giraffe,addgene/giraffe,addgene/giraffe,UndeadBlow/giraffe,BjornFJohansson/giraffe,BjornFJohansson/giraffe,BjornFJohansson/giraffe,addgene/giraffe,addgene/giraffe