Just picked up a 67" Fusion. Have two motor choices 1) OS 91 fx 2) OS 120 4 stoke any thoughts and ideas would be welcomed.

Thanks

We flew the Fusion on OS .91FX motors for a long time before the 120AX motors came out. The OS 120 4s is kinda bulky and heavy from what I recall. Personally I would go with the 91FX. Check out the obline video showing Andrew Jesky flying the Fusion on a 91FX. Plenty of power and that was one of the prototype Fusions that weighed 1/2 lb heavier than current models.