Sal,
Most recently, I purchased a plywood Phillips board a few years ago. a while back I went to my local modeller's shop and got some baltic birch plywood and made some boards of my own. I recall I may have had to laminate two sheets together to get the correct thickness.
Regardless, the resin will probably machine just as easily as the wood (with a router, jig saw, etc.), but it may be somewhat flimsy when a large hole is cut out of the middle. My homemade adaptor for the Phillips to Canham/small Toyo boards works quite well, and was designed to fit in the camera while it is folded, so I leave it there all the time.
---Michael
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