Quote Originally Posted by Bill Dufour View Post
A countersink cage is accurate to 1/1000" per click. So far better then most wworking machines. It is designed to sink countersinked fasteners dead flush to an aircrafts skin for aerodynamic reasons. Just run it with a regular electric drill motor no need to run out and buy a pancake drill or anything special.
Bill D
https://www.browntool.com/Listview/t...2/Default.aspx

That would be just the thing except it doesn't make a flat- bottom hole, can't do 3/4", and costs $60 plus shipping.