PBS-1 Fix

Fixed Middle so it would thread on properly. The middle files from the OG post have a ridge that prevents the threads from catching and tightening into each other. I solved this by using a hacksaw and cutting them off on my already-done print and it worked great after that. I edited the file and basically did the same thing and just cut off that ridge in the file here. Let me know if it works for yall.

I have a remix of the first PBS-1 and that was an accident. I meant to post it to here not the one from 2018.