Stuart, yes I agree my RX pack is way overkill. What I have found after 13 years of IMAC flying is that the big gassers bounce the control surfaces quite a bit and that is the major power draw. I have a 900 mah lipo RX pack and a couple 5 cell 4500 mah batteries on order and that should get me to legal weight. If the airplane works as designed I will be able to fly a little slower then I have observed some of the newer pattern ships flying. I have seen some mighty thin airfoils out there. It's funny, we have gone that route with the big IMAC types to be better snap performance because the IMAC sequences are full of snaps. In the pattern advanced sequence there are only two snaps and one of those, the avalanche has the airplane loaded positive so poping a neg snap is no issue with the thicker airfoils I am using. The second is on a 45 degree downline so a quick pop of up elevator followed by rudder and aileron will get the job done there too. I'm pretty excited about the test hop tomorrow and will report back with my findings.