RE: to use smartfly or not
Okay you're quite possibly asking for trouble on a 33% size model vs. what's worked for you on a 50cc size gasser. Specifically the use of NiMH batteries can be problematic depending on size and IR ratings of the cells and just off hand I don't recall seeing any 2200mah NiMH cells I'd trust to a 33% size model.
As for what else you might need depends on your radio setup and whether or not it can handle the four wing servo matching? Some rx's have an electrical buss capable of handling the model, some don't, some electrical switches when setup correctly will do fine some won't.
As mentioned, there are lots of ways to do a 33% size power system but you WILL need more capability than your 50cc stuff is using.