More progress today, I got the first backstop made and fitted.
It is made from 3mm hardboard covered in terry towel stuck down with spray glue.
There are five hooks made from ply that twist and hook over the metal frame.
The pellet will go straight through this thin backstop and hit the rear MDF board.
If it rebounds, it will not have enough energy to come back through the front backstop and be retained in the backstop cavity.
The terry towel gives a very good flat white background for diopter sights.
Only the rear MDF backstop to be made now.
https://ibb.co/x2KPdW9
https://ibb.co/W5h815F
https://ibb.co/sq14H0W
https://ibb.co/8N0qHx9