Ed,
I believe I received advice from you in another forum about 3 months ago. I ended up buying the APC vacuum bagging kit and resin. I intended to use this to glass my all wood build-up plane. I noticed when I put the wing within the bag (without resin for trial purposes) and turn on the pump, there are depressions in the wing skin formed between the ribs of the wing throughout its length. So, my question is if bagging is really ment for foam core only or can build up wings use this method as well? Does the wood "spring back" even after the resin has cured giving the original smooth contour?