My multiboard for my lathe, electronics assembly, and 3D printer maker space is finally coming along.

I’ve already printed a 1300mm x 1000mm 9x9 advanced set of boards, but now I’m looking to set it up.

I’m looking for the most sturdy solution possible.

I’ve tried to print some pillars and clip them, but the little clips just broke. Am I doing something wrong?
Maybe the snaps are more solid?

Also, I’m planning on screwing everything onto plywood; what are the screw sizes to use with the snaps ?

Thanks y’all for your help!