Denis G. wrote:
I like the idea of using the bearings to limit the depth of cut
with a file! Also liked Jim Wilkins' idea of using a spare keyed
drill chuck as an index.

x2!

-All- the ideas have been helpful.

And Wild_Bill's got it right about drill-butts being
soft up to a certain spot too. (that spot varies

I got this but it's not square like yours is, JW...
http://www.panix.com/~alvinj/file12/beltsander.jpg

I "could" make something square tho, I think. xD

But I've been wanting a chopsaw for a long time...

Alvin in AZ