I have not sealed the hinges on the Cap-X, seldom do on my planes. I don't fly anything very fast and am of the belief that flutter occurs from sloppy/incorrect linkages more then anything else. On the other hand, it can only help if you are using CA hinges. (I'm using Robarts).

Well, the balancing is done, just as I suspected, she balanced perfect. With the Brison 2.4 and a BCM 15degree Pitts style muffler, 2700 mah Nimh flight battery and 1200 mah ignition pack, the cg wound up at 3.25" back from the leading edge measured at the tip of the wings as indicated in the instruction manual. That is with a 16oz. tank mounted centered on the CG and the ignition and battery up next to the firewall.(either side of the engine box). The flight pack battery is under the tank and butting up against the former at the front of the wing saddle former and ending at the throttle servo. Carbon fiber tailwheel and all CF/Titanium pushrods from Art's hobby. Moving the battery back 1/2" moves the CG to the 3.5" mark.

I have a few loose ends to clean up and need to cycle the batteries again and she will be ready to maiden. Mainly what I need to do is adjust the engine, and mount the switches. Sure is a challenge mounting a switch in a plane with Covering for sides!