[posted and mailed]

Fred McClellan wrote in
:

Hi all . . .

I need to build a new model airplane building table; my old
hollow-core door lash-up finally sagged after a year's use.

The table needs to be dead flat.

This is overkill for what you need, but it might give you ideas for making
a torsion box:

http://tinyurl.com/kcxf
http://www.diynet.com/DIY/episode/0,...K-409,FF.shtml