On 2007-03-24 12:48:15 +0000, Stuart Noble
said:

Vacuum clamp maybe?

I have some of these (Airpress Vac Pots) that I use for woodworking.
They are very effective for holding work for routing etc. on the bench.

For this application, I need the 2 dimensional adjustability without
undoing clamps and moving things.

However, perhaps in combination...