The one thing that I have noticed is that people say there engine will hover at 1/2 throttle. That I think is kind of misleading. When I first setup my 15 lb. cap and ran it it would climb out of site at 1/2 to 5/8 throttle. I wonder if these people have ever tached thier motors when there throttle stick as at half throttle. I found on my ZDZ 40 that I was turning almost peak RPMS at a 1/2 to 5/8 of thottle stick. I'm sure alot of it depends on what size arms you have on the carb and servo. The only way that I know of setting up the throttle so that at 1/4, 1/2, 3/4, and full thottle you have true numbers is by programing a thottle curve. I did this and found that it made thottle application much smoother and more precise.