I have a Grado ZF2 that needs a stylus. Are grado styli interchangable? Could I use a Grado Prestige Black replacement? I also need advice on judging Grace F9E stylus wear. I see the tip, it looks pretty good, but it is small and sometimes skips without much reason. I'm searching for mounting screws and nuts for a Shure V-15 type III, 11/16 of an inch long. Does anyone know where I can find these? Last but not least, any ideas for removing a Signet arm lift mechanism from the plinth of my Planar 2 without damaging it?