Some notes after 10 successful flights.
1) 3s 2200 was too small. Replaced with a 3s 2700 and now get +-6 minutes with the two Suppo 2217/8s.
Had to redesign the battery tray for the 2700 but I think I actually saved some weight this way. You're pretty much on your own for the battery tray anyway as it's not
sufficiently outlined in the manual or plans, but hey. It's a battery tray. How hard can it be?
2) Front motor was giving me fits. Turned out one of the motor leads had a poor solder job from the factory. Resoldered the bullet connector on, no more problems. Plane will fly on just the rear motor though with absolutely no problem.
3) Because of a small tip stall issue I added some aileron reflex to induce a bit of washout. She'll still drop a wing but you have to slow her down a lot more. The maiden's landing was pretty hot and she still dropped a wing but now she's a touch-and-go queen.
All in all I couldn't be happier.
Here's the maiden video.