If you can keep the model under 3kg (6 1/2lb), I would not have any hesitation using the 55AX.

I have flown this in the 63" span 2.4kg (5 1/4lb)Angel S and it has UNLIMITED vertical swinging a 13 x 6 APC on the stock muffler. 15% Nitro / 20% Coolpower (purple).

Jeff