Back when I was porting 2 stroke cycle engines, I had access to some pretty nice equipment like you mention. That was a long time ago and I never could afford to buy stuff like that for my own use.
The rotary tools I use now are use for much less precise work but it's something I do often and I've been happy with how the Dremel is holding up so far.
I might sill take that Harbor Fright 1/4" die grinder apart and replace the bearings. It makes the sounds of skipping bearings and since I'm not thrilled with it as is, I have little to loose. I'll look into a Makita die grinder. I have other Makita tools that I'm very happy with.
Tony
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