Good point, cutting slots to install the subspars would be easy and there would be no noticeable strength hit.

I have a question about the Balsarite. I know some people swear that it causes problems. However, when you rean the product discription, it seems like it does a lot of good things including fuel proofing and strengthening the wood itself. Is this a good product to use over most of the model to promote better adhesion, or should I only use it when absolutley neccesary (like over fiberglass). I can see where it would make it harder to disperse bubbles, but I have applied decals and paint protectand films to cars before and I wonder if all their problems are due to trapping air by sealing the perimeter of the film first rather than starting near the middle of the sheet.