Mr NCT
Site Moderator
You should be better than fine with that weight. You mentioned not enough thrust. With either of those motors and that prop at full throttle it should have jumped out of your hand. What did the plane do?It's almost 12 g lighter(dry) than the spec. from FT's SBK.
Here's a heavier much crashed plane with an 850 battery and I don't even go full throttle