RE: what model to get for my os 91 fx engine?
If you're starting in pattern by all means go for the Swallow... I did and don't regret it they're only US$210 and i am seriously thinking of buying another one to recover and full feature.
mine has a .72 Irvine on a pipe by just engines and flies VERY GOOD!!
if you go for it let me know and will tell you where to beef it up.
I am running a pull ppul rudder and CF pushrod for the elevators, all around hitec servos