Lacking the proper tools in my apartment, my girlfriend's father fixed it pretty quickly (it was an easy fix, I just couldn't do

But a better fix is to grind away a few threads near the knob end to provide more un-threaded length on the screw.

I wouldn't exactly recommend it if you need something heavy and studio-grade, but it worked for me as a quick fix to a coupla problems.

But a better fix is to grind away a few threads near the knob end to provide more un-threaded length on the screw.