No too fat

22lbs wet is about right on this plane, it carries somewhere around 100 to 120 oz of fuel. It will do fine on the 600R but vertical will be somewhat limited for the first half of flight. I had a P-80 in mine and vertical was unlimited from takeoff. I flew for 10-12 min and still had plenty of fuel left, didnt use full power much except for vertical. Don has been flying his on the 600R and it does quite well.....No need for a P-120 but a P-80 seems to be a perfect match at 19lbs thrust...
just dont get it too slow without flaps []
Todd