sm-1 feedneck issues
i have an sm-1 with what i thought was stripped out feedneck threads, cuz the neck fell off while playing yesterday. looking closer i found some type of grey compound in the threads (epoxy?). after cleaning out the stuff, the threads on the gun and the neck look pretty good, but the feedneck just slides right in the feedneck hole, almost completely missing the threads. my questions are: first, what feednecks thread into an sm-1? second, have u ever run into stripped out feedneck threads and what would u do to fix it besides replacing the whole body of the gun? third: do u know the size and thread pitch of the feedneck threads for possible re-tapping?