I have found the most wonderful tool! It's a dental lab handpiece and mirco motor. It is amazing, you can't even feel it running. Absolutely no vibration. It goes forward and in reverse. You can crank up the speed as needed.
The handpiece has a 3/32" collet. One twist of the middle section releases the bit for incredibly quick changing. And one of the best features of all is it has a foot pedal!
And I already had so many great 3/32" shaft bits, some actual dental bits I got some 25+ years ago.
I had these tiny drill bits but I was so glad I found a 3/32" shaft micro chuck! I also bought some micro drill bits with a 3/32" shaft.
I can do things with this excellent tool that I can't do with a Dremel or flex-shaft!
I bought this on ebay and while there was some price swing, you should be able to get one for under $200.00