drive repair tips?

I've seen those, though not (so far) in disk drives. I have an interchangeable-bit screwdriver whose set of bits includes some three dozen "security" bits of various kinds. I don't know the names of most of them, but there are pin-in-the-middle torx, pin-in-the-middle hexagon ("Allen"), something I might call a three-bladed Phillips (like a Phillips but with one vane removed and the remaining three vanes at 120? from one another), "offset" Phillips (like Phillips with each vane offset to the side by approximately its own thickness), two-point bits (for which the screw head is solid with two small holes, one on each side of centre), and what I might call "butterfly" bits - I have no simple unambiguous name for the shape, but for those who know PostScript or who have a PostScript interpreter, "250 500 translate 0 -15 moveto 0 0 50 -40 40 arc 0 15 lineto 0 0 50 140 220 arc closepath stroke" gives a fair idea of it. Plus a bunch of non-"security" bits: regular hexagon (both inch and metric), square ("Robertson"), Phillips, ordinary flat, and something which I didn't recognize when I got it but thanks to an earlier discussion here I now know is called Pozidriv :) - all in various sizes. No, finding the screwdrivers is unlikely to be my problem. :) /~\ The ASCII der Mouse \ / Ribbon Campaign X Against HTML mouse at rodents.montreal.qc.ca / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B