Thanks for all the details about what you did.
I got the GITD spiders BAG (before air guns) and have not done any night shooting. Yet.
Some details for you:
The spider legs span 2.75” at the widest part, so you would need a steel can of at least 3” diameter to make a suspended spinner in it. A quart size paint can or the large old-fashioned nectar cans should work well if you remove the lid or run a can opener around it, respectively. The can would be hung or mounted on its side, with the circular open end and the hanging spider facing you.
The spider itself could be hung with a cord loop around its body. Then drill a hole in the can wall and pull the open end of the cord through that, through a small flat washer, and then knot it on top.
The nice thing is that the other circular end of the can could be lined with something, to make it a pellet trap. When I make nested soup cans to shoot, I put both of the poptop lids inside also. That makes 4 steel layers. So far, nothing has made it through the back.
The bag of spiders contained 10 of them, and I am using only 2 (to mark where a floor lamp and a post are inside so a nightlight isn’t needed). If you want, I’ll give you a couple spiders. Same for iAMzehTOASTY1.