All out sport over "full-on" 3-D I would think.
Checked out the "Larger Revolver" string, some excellent pics showing an under cart conversion show clearly the engine mount area. Looks sturdy alright.
Maybe a bit oldskool but the engine mounting is the main point of a model to me. Haven't had so much fun as flying gassers in a long time, and specially like 20cc size models.

Now if I can just get some O/T to pay postage...........