If you built it stock, then you won't get much 3D out of it as the rudder and elevator are not powerful enough. The thin ailerons don't help either.

I have a Saito 72 in mine and it goes very well, but plan on putting a Saito 91 in it instead to give it unlimited vertical. I fly it for general/IMAC aerobatics as it does these very well and smoothly for a 40 size plane.

What weight is yours? Mine came out at 6lb (2.6kg) with the Saito 72. If yours it significantly lighter, then go with the Saito 72, otherwise consider the 91 like me.

If you wish to stay 2stroke, then you have the problem that all the 60 size engines weigh a lot more than the 40 size engines.