I've got about 16 flights on the 109. Not too many because I will only fly this plane when the wing is light and more or less down the runway, which around here is not often. It will fly with the DLE 20 and can do all the warbird maneuvers but you have to fly smoothly and conserve your energy. It could use a little more power. I am contemplating installing a larger engine this winter. It needs to be a beam mount gasser around 28-32 cc. I've looked and the choices seem limited. RCGF has a 26cc with beam mounts but may not be worth the trouble. There is the NGH 35cc with rear exhaust. This seems a little large. I see Heli-NuBee used the NGH. It seems a little heavy to me but I suppose you can get a proper cg by moving the batteries back. I also have a Frank Bowman ring for the DLE 20 but doubt that would make enough difference. Any suggestions on engines? I don't want to rebuild the whole front end to use stand-offs.