"Tim Wescott" wrote in message

Actually, I can easily design the piece so that the absolute height
of
the holes can vary by 1/4 inch up or down -- it's just the relative
height that's important, so that a shaft stuck through them is more
or
less level to the bottom.

Is the quantity big enough to justify making a drill jig plate with
edge locating pins that protrude from both sides?
jsw