Mine was 50c, I think.... figuring out ways to hang on to stuff, and sand/file/cut without fingertip torture, makes all this stuff a lot more enjoyable. Cut and glue some rubber sheet to little sticks and do the same with thin mousepad neoprene to sand & polish with instead of fingers... it's worth it to me to have the Micro Mark, Stew-Mac, McFeely's & Lee Valley catalogs & scope them just to get the concept of a time & finger-saver device, then cowboy it. I am a really cheap date.
F.E., you can make abrasive paper-holding "fret crowning files" of any width, depth &
contour by drilling the appropriate holes through 1" X 2" pine sticks, then saw
along the hole carefully to get the slot out of it, thin it down flat-wise and glue in rubber sheet. You won't get
contour out of the store-bought ones, so you have to use the triangle files and consistency with them (22 frets = 88 corners :confused4

is a bitch. THINK, that's all. I look at Stew-Mac's $80 - $150 "kits" with amazement. There are even books and probably vids by now about making tools, jigs and stuff, but really, ummm, jeez. You just look at some recalcitrant little damn thing and tell it "I AM GOING TO DICK WITH YOU, DAMN THING."
but you knew that