Those Thunder Power Gen 2 packs cheap and quick from Dave at www.lightflightrc.com
I am thinking of moving the front servo down to the rear behind the rear servo. Or on top of the rear servo or rather below it when the wing is bolted on. All of this to make room for the 2 packs of 3S TP 2100. Then a 16/15/x and CC-45 to go warp speed.
Also a Schulze 535w to save some room.