My buddy just flew his last night...

They will fly with a 25 cc gas engine. I think I installed the radio under the stab to balance with no lead.
Landing gear blocks are best beefed up from inside the wing. I made access panels that screw off and on.
Wheel pants hang down to low and must be trimmed for grass runways.
You also want slippery wheels that don't grab inside the wheel pant and act like a brake on harder landings.

can you say GeeBee cartwheel ! hahahahahaha

Mine and his planes both...take off and fly great, they will keep you honest and humble landing.. THEY HATE CROSS WIND LANDINGS maybe worse than WW1 planes.