I purchased a used case of a-100 modules to supplement my existing
system. The only problem is that one of the screws for the a-155
sequencer module is totally stuck. This wouldn't concern me so much
except I might be buying a second a-155, and would need to remove it
temporarily to make the proper connections.

It was suggested that I try a pair of pliers to try to get it out, but
all I suceeded in doing was scratching the surface ):

I am at a loss. This screw won't budge, and at this point, it's probably
totally threaded. I'm not good or experienced with this kind of
thing...anyone have any suggestions