Well, it may not have been the cause, but it sure didin't help things any. Besides the shifting of the CG, there was a good possibility that it would "pull the plug" at some point and the CG would have been a mute poit.

Go get a flat swim noodle and cut it to fit to lock down the battery and any thing else that may want to roam around in the cabin when inflight. Wrappedd foam and rubber bands will come loose and the soft grey foam will soak up fuel like a sponge if your tank develops a problem. Having just bought a couple of experienced planes that had things wrapped in the grey foam, I'll tell you that the foam breaks down and leaves a gooey mess at some point, fuel or no fuel. Get some of th closed cell foam, the swim noodles are one source, the white packing material is another, not the styrofoam, but the rubbery white foam. It is very light and has enough stiffness to be able to lock in place under stringers and such to hold things in place. The fuel will not atack it, and even if you dump a full tank of fuel in, the foam will not gain more than a gram or two in wieight and that is only what is wetting the outside of the foam.

Don