Bernard, thank you for drawing up those plans. They worked great. I always modify and alter the build to my taste and ability but the plans were a fantastic base to work from. The top fuselage formers gave me some issues, but I'm sure that was my fault. I built the wing as a removable piece, mainly to make covering easier, but it did complicate building the top keel, etc. If you are interested I posted photos of the build on the Stick n Tissue sight under Schneider Trophy Cup Cookup. http://www.stickandtissue.com/cgi-bin/yabb2/YaBB.pl?board=grumman
The balance is very close with no added weight. I'm sure that I'll need a small amount once I remove the hydrofoils. The Pc.7 did not turn out light and weighs approx. 36 grams. It will be interesting to see where the actual CG is since the plane never flew and Bernard has indicated the 'suspected CG' on the plans.