An OS .25 FX on a Battle Floyd? If I was in your shoes, I'd put the .25 on the bat, and the .20 on the Floyd. Not that the Floyd can't handle the power, I've seen several guys around here run .25s on Floyds. But built stock, a Floyd with that much power won't hold up when you run in to something going that fast.

I fly modified Battle Floyds in A class combat, with Mag .15xl engines, and they are very competitive.

If I could only get my B class planes to turn like my A class Floyds do.