I decided t' make a Johnny Rockets paper ketchup bowl into a model flyin' saucer. Well, blow me down! It is 4.5" diameter and weighs only 0.4 oz empty. Begad! I test flew it on an Estes B6-4 for its first flight. Well, blow me down! it was perfectly stable and flew straight up with no wobble. Begad! On descent it fell straight down with no tumble. Avast, me proud beauty! OK, let's try a motor that has 8 times t' thrust!. Ya scallywag! An old (discontinued - too bad!) Aerotech E25-11 fit t' bill and here be t' video. Aye aye! This time it whipped off t' pad and flew straight up. On descent it tumbled because o' t' heavier motor.