You've got the 46AX right?? Then you can definitely use that engine on the OMP Pro Yak, its got enough power to get you going. And the Saito 91 might be overkill on power, but its still light enough to not make your plane a lead sled. Just run a 15x4 with it and will be golden. So you could use either of those engines. A profile is definitely the doorway to 3D.