[spawningvat]

Hold up a sec. You might want to try some other stores for finer grit sandpaper. 600 grit is still very coarse, possibly more course than the machining that is already on my the heatsink. And if you start at 200-300 grit, you might actually gouge the heatsink, which is what your trying to remove in the first place.Walmart sells 1000, 1500, and 2000 grit wet/dry papers in their auto section, and most auto stores like advance auto or autozone have a fine grit sandpaper selection near the paints.

Use some soap too, it will help the heatsink slide easily, and wash the sandpaper off and rewet it to keep it from clogging.

also grip the heatsink as close to the bottom as possible, so as to prevent wobbling and messing up your lapping job. and try to move in a circle or in a figure 8 motion, and rotate the heatsink periodically to prevent taking off too much from area.

just wanted to double-check that your are moving the heatsink over a piece of wet sandpaper, stuck to a piece of glass. Do not put the heatsink in a vise/do not clamp the heatsink and try to move the flat piece of glass/sandpaper over it. The idea is to make the heatsink as flat as possible, so lots of light, repetitive strokes are better than a few heavy strokes, which might not be perfectly parrellel to the heatsink.

Post back if you have anymore questions.


later
sean

edited for spelling