I also had one comment about the tank. A lot of people have been asking about putting the tank at the CG. In order to do this you need to either buy a tank that will fit, or do a little cutting on one of the fuse supports.

One other option, although not quite at the CG, is to simply not push the tank all of the way toward the engine. You can push it rearward all of the way until it touchs the support that the servo tray glues to. That is much closer to CG than the stock installation and you do not need to do any cutting. You'll need to secure it in some fashion, but there would not be any cutting involved.