Hi dag, looking awesome, very inspiring indeed. Would love to see it one day and hope I can when I get to the US soon.
As to the putz that send you the email stating that you need 150w/lb, he got his personal intake and exhaust mixed up big time, I am flying a 11lb 3oz Pattern plane at the moment with a calculated 1550w brushless/lipo setup,( 138w/lb) and I have unlimited vertical with that. You figures of 100-110 w/lb should give it a nice lively performance envelope, and scale should be nice and relaxed.
get well soon