Thanks for the offer, but I am going to try to fabricate pillowblocks
to hold rollerblade roller bearings. And having fed these raised panel
doors by hand previously, I know they can jerk violently in any
direction. I have some small shaft mountable sprokets and chain laying
around, but am afraid the difference in slop between the Acme screw and
a chain would be enough to tear out the wood on my workpiece. I like
the chain feed idea though, if I make a sliding table for my table saw
that would be a good way to drive it.

- James B