I wouldn't fret the GS bushings too much. They are very inexpensive. I normally just use a pair of vice grips on the threads and unscrew the screw, then put a new bushing in after I clean it and the holes in the frame with acetone and use a dab of red locktite. Install a new screw and 'viola, your done. A pack of four each would run you about 6.00 or 8.00 tops and they are good to have around. This is actually something I do in a reliability tune up along with replacing or restaking the plunger tube. The factories don't pay enough attention to these areas on their best days.