I recommend that you get these MG-90 servos from HeadsUpRC. They are inexpensive, metal gear and very durable. I have probably used 100 of them in planes I have built.
I taped the Minimoa wings together with fiberglass packing tape. Works nicely to hold everything in place for transit. Also, I replaced the original metal wing bolts with nylon bolts that screwed into a piece of plywood. You create the threads by drilling a slightly undersized hole into the plywood, then threading in the bolts. Remove the bolts, apply some CA and presto - you have a great wing mount.
Best of luck,