It's an 11x6, and I have about 1.5-2" ground clearance with the fuse level. How much clearance is enough? I think I'm fine here, but I don't know about a 13" prop.
I checked the balance again yesterday with more stuff mounted. Definitely looks like it will balance perfect with just the battery being moved around in the cockpit.
My old Futaba Conquest 6 died while trying to fly the Cub, so I'll have to get a new radio. Probably a 9C. Kinda sucks. The old radio had pretty low "total time". Probably only burned 4-5 gallons of fuel over the past 10 years (maybe 2-3 10 years ago, on my 3rd now since relearning to fly this year)
Seems to be a problem with channel 4 and 5 in the transmitter. The rudder goes hard over, and responds to the gear switch instead of the rudder switch. I tried it with the Decathlon reciever/servos and get the same result. [

]
I had spend about 30 minutes tuning the engine (low speed needle), taxied out, and the rudder just went hard over. Thank goodness it happened on the ground!!![X(]