Had to work late last night & missed the club match, so no picture of the popper, sorry.
In the meantime, I've made two versions of the forward-falling popper. First one uses a 'springy' bracket: popper bounces off of it and falls forward:
It works well, but the popper is almost upright so BBs bounce back, not down. So I made another one: a screw on a wire drops down when popper is hit:
Wire length is easy to adjust so I can control the popper angle. Falls on every hit, so this one is a keeper.
I taped a 4" electrical plate to the popper, the flimsy aluminum they're made of dents too easy.
Also made a 4-plate rack:
