SK- 50. Loved it for three years and flew it HARD (four seasons of the year!). Lost it trying to do a limbo pass entered at head level upright and half-rolls at that level to inverted and back out. Made the inverted but caught a wing tip at full throttle and it was ugly. Old enough to know better. That particular plane had three different engines and was a great test bed and trial horse for experimenting. Did beautiful axial rolls with just a touch of differential programmed in.

Liked it so much I may get another.

I don't care much for the SK engines. I tossed the stock carb and added a Perry carb to my .50 and since then has performed wonderfully.