Yeah you're right.....REQUIRES: Engine: .32 -.50 (5-8 cc) (2-stroke)
OR .52 -.70 (8-11cc) (4-stroke)

NOTE: For maximum 3D aerobatic performance, choose an engine in the
upper power range. The O.S. Max .50SX (OSMG0550) is an ideal engine
to utilize the full aerobatic potential of this airplane.



SPECS: Wingspan: 56.75" (1441mm)
Wing Area: 904 sq in (58.3 sq dm)
Weight: 5 - 5lbs 10oz (2268-2551g)
Wing Loading:12.7-14.3 oz/sq ft (39-44 g/dm2)

I haven't ever seen one fly on the smaller 2 stroke engines but I just don't think it would have enough power to fly much 3D with it.
I've always had a Saito 82 on mine and while that sounds like a bunch of engine it's about the perfect match for the 46 Do. I don't know what works the best in the 2 stroke engines.