How are you going with the stock motor?
Mine has some nasty resonance at low RPM, but smooths out higher up. Like something wrong with the cogging on it. I'm just going to use 2S as well, seems adequate thrust for gliding, and no risk of over-heating (although if I put FPV on it, I'll re-think the motor/battery combo).
Similar to this plane, have you seen this new HK one?
wow, no foam, big fuse, landing gear, flaps done. Looks really really nice..