Meanwhile, something I cobbled together a while back, but never got around to tuning it properly.
No idea which kit this is, it's a 59" wingspan Cub, but I cannot find anyone who ever made such kit.
The engine is a Magnum XL52, with several scratches in the liner, but still running pretty good nevertheless. Thinking about getting at least a new liner and a new ring for it.

Note the absolute lack of exhaust smoke on gasoline.