As stated in the title, I have a Seagull Edge 540 (60 size). Currently I have a Saito 100 in it and I am not happy with the power. It flies fine, but is under powered. It takes full throttle to hover, and even then she wants to fall out of the sky. The prop is a Vess 14x6. I was thinking about a 26cc gasser, but one, don't know if it will fit in the cowl, and two, is it any stronger than the 100? Should I go with a 120 four stroker? I am open to suggestions.