UPDATE:

I cut the extensions back from the trailing edge forward. Flies muuuch better now.

I haven't even done the CG adjustments Nick suggested, I just added another T pin for 5 total, which also helps.

Observations: Any breeze wants to really take it and run with it, but...it's no longer so spirally unstable. It doesn't PIO, it balances out the gust thanks to its big dihedral, and it glides with just a slight turn into landing, and the motors trim up to fly straight and level with the TX pot. So without even moving the motors yet, or even repositioning them, it's a super-floater now.

Even with less wing, it's much more efficient. At even low throttle, putting in turn makes it climb. Any light little gust at all and it climbs for the stars. I had to keep it down to 20-25 feet because i was afraid breezies would throw it into the very tall trees all around my yard.

I'll post some video soon as I can find someone here at home who can do a decent job with the camcorder.

Really fun to fly. Though heavier with the wings and t pins, it still climbs very well and I can now control it even in light breezes...just gotta be quick on the sticks and be willing to shut off power for lots of little short glides to bring it back down closer to the deck.

Once I move the battery, move the motors, and perhaps thin out the wing extensions a bit (they're kind of thick, I used my teeth to crimp down the trailing edges) it should reall be a floater.