RC4Life am using the JR PCM9X under SPCM, no interference problems whatsoever. I always carry out a 100FT radio check at all times just incase someone is flying nearby.
Am running the stock fuel tank that came with the WM330 it's a decent sized tank if I am not mistaken it's 850cc i'll double check on that. At the moment am braking in the engine and honestly the flying time is suffiecient enough for me to enjoy, I never clocked it since I am still at the breaking in the final stages of breaking it in, I think it gives about 10 to 12 minutes easily.
The prop am running on the plane for the breakin is a 22x10 once broken in will be switching to 23x8