I am putting a DLE 20cc gas engine in mine. I hope it isn't too heavy. I was considering splitting the stationary horizontal fin (between the rudders) and hinging it to the trailing edge, and hooking it up to the elevons. I was thinking it may help for hovering. Any thoughts on this?

Also, I fly on a very rough grass field and I was contemplating building it as a tail dragger. How are your retacts working out, and would they hold up to a grass field?