You might want to have T-gear on when you do it if you've never tried to fly a heli that was out of trim. I tiped my raptor over a week ago when I was setting up my 401/9253 with the same problem and I switched from HH to normal mode 3 times fast while hovering 8 feet up<lol, oops that's also the command to RESET the servo center position>.

Found out when I did my tear down I put my tail rotor blade grips on backwards which gave it LOTS of left and a little bit of right, it also made it drift.

Oh yes, make sure you never adjust anything on a heli unless it's a good 100 feet away from you!


Worst case your heli will want to yaw left or right a lot in normal mode. You just have to trm it out, find the mechanical position for a stable hover by using your trim then set it up so that with no trim it will hover in normal mode without any yawing. You get most of the rudder trim set by getting light on the skids, then final adjustments are in the air.