when Hi I haven't been following this thread but I thought I'd add: When working inside of disk drives, wear a mask ( the ones you get from the drug store work fine ). Also, don't work in a room that has had someone smoking or while someone is frying stuff in the kitchen. Most dust particles are large enough that the head just kicks it of into the filter. Smoke particles are the right size to cause head crashes, as is a little bit of spittle from a sneeze or speech. Also, don't rotate the disk backwards, the heads will cut into the surface and damage them. Dwight