Why must answers always be in "absolutes". Winglets do not belong on aerobatic models? That is a strong statement and not very helpful. I would be very suprised if my winglets interfere with my style of flying. Thanks for the photo Mr. Hanson. That is sort of what I had in mind, except my winglet would only extend above the wing, not below. I'm not looking for a side-force generator but just a little help in wing loading and tip stalling. I had this same plane a few years ago with a Zenoah Mag. G26 on it and it flew OK. I knew to keep the speed up in turns and landing but the plane was a pretty good flier (basic aerobatics and flying the pattern). This Cap should be 1 to 2 pounds lighter than that plane, so I don't think the wing loading will be excessive, just a little high.