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I posted this on /m/, hope nobody minds I post it here too since I could really use some advice.
If there's a part I'm modifying and I want to have a movable polycap in it, how do I go about making that happen? I don't want to just glue it in there since I want it to be able to move.
Pic related is what I'm trying to accomplish, I want the black piece to be able to slot into the leg with a polycap that can still swing around, so it can keep some articulation and the lower leg isn't just frozen solid aside from a tiny bit of foot swivel.