Thanks for the advice on a 10x10e for the stock setup. It added a nice bit of speed and maneuverability to the flights.
I did notice a relatively sharp drop in flight times per battery, but I guess that's to be expected pulling more amps.
With the little kick in the butt from the new prop, maybe I'll scratch build a new S-Cub from my old overly crashed/glued one instead of moving the Power 10 to the Trojan. The more the merrier in the hanger
I've got an AXN Cloud Floater on the way, so the three will make a nice combo of variable flight characteristics.