.46 size 3D ARF
I don't own one, so I may be wrong but . . .
I think the Funtana is going to come out at about 5 lbs, so it won't really be a good 3D bird with anything less than a strong .70 four stroke, I don't think a .46 two stroke will cut it. If you go to a .52 or something like that it might work.
Leonard