Have you ever had problems fitting the roofs onto a rolling stock kit? If you have this is your answer. This jig allows you to take your time to fit your roof without the use of lots of elastic bands and fingers!
The jig is fully adjustable so mostly any roof can be accommodated from 16mm / ft to 7/8ths scale. As you can see from the picture there are no more ugly fitted roofs any more if you use this jig.