well joe i guess it dont matter because i was doing a knife edge about 20 ft up and came out on high rates and screwed up so i am now a member of the smash up big time club.went into the ground almost straight in so the next one will be better. miraculously my electronics and engine survived. oh what a video it would have made. well im off to the hobby shopi go. but as far as the scales went i had no way to cal them except a 5 lb dumbbell and it was on so i really dont know .ill be back