suitcase...
That's funny. I always lateral balance all of my planes. It think it does help. Also, there is a fair amount of RH thrust on this airplane. Both of those will make it bank right a bit. When you do a hover though it seems to me it's hard to have enough RH thrust. So it may be a bit of compromise. However, I don't recall mine being a problem to fly straight and level. Maybe at full throttle but certainly not at 1/2 to 3/4 which is where I fly most times.
Good luck and I hope you continue to enjoy this beast.
thanks
Barry