RE: U-Can-Do .46 + TT .46 Pro...what prop?
I'm trying not to get the engine to it's high RPM. With the 12.25X3.75 W it should be around 12500-13000 at full throttle but the thrust is higher. I can't say anything about your suggestion because I didn't try it yet, but I can tell you that only for the engine's first tanks I used 11X6, same reason.
Maybe I'll try your suggestion. Thanx.