Please don't take this the wrong way, I'm not trying to be "harsh" here, but the FIRST thing you need to do before you worry about tuning the engine is getting that thing set up right... When throttle hold is on, the engine should drop to a point where the clutch is disengaged and should NEVER be able to throttle up beyond that point... you should never even be able to get the blades to spin when the throttle hold is on, let alone get it to hover... If that isn't set up right, then it's hard to tell how many other things are incorrect.. Surely there is someone experienced around that could help you out? Even if it means taking a day trip somewhere? You need to make sure your pitch curves are set up right, make sure your throttle curves are set up right, make sure your head speed is right, and get that radio set up right...