GP Wagstaf is really around 27% scale, I fly mine with a ZDZ 40 and I wish for a little be more power, your DA 50 shall performe perfect on this plane, it floats a lot, pice of cake to land, great aerobatics, I do not fly 3D staff with this one.

I have not see or try other brands in this territory, however I happy with it and I recommend it to You.