I have a really old P-80 that is looking for a home. I would be suprised if it pushes out any more than 18lbs. Would this be enough to fly the Flash?

What is the performance like compared with the Kangaroo/Rookie on P80? I know they are completely different models but it would give me a rough idea whether my P80 would be enough for me in the Flash.

Does anyone know if it is possible to get more ooompph out of the really old P-80s?