Ha! That reminds me of my Kadet Senorita! With OS .25 FP (flea power!) it originally would ROG, especially if a stiff wind was present. I bought it with the engine almost worn out. With age and use, it became weaker and weaker. A couple years ago I dug it out to do instruction with a fellow who hadn't finished his plane, yet. I could not make it ROG on a calm evening, so we hand-launched it! In the air, it could still loop and roll (after a dive, of course) but would not lift off the grass runway.

Just reminiscing. Trouble with getting old - everything reminds me of something else...
Dave Olson