I am trying to do something similar to what wolfv is doing with their "friction ball and socket clamp." The main issue I'm running into so far is that I'm not sure how much space to leave on the socket part of the device. I guess what I'm asking is how much room does one need to leave between moving parts? Does the material expand/contract during or after the printing process? I've included a screenshot of what I have so far; hopefully it is clear what is going on. Thanks!