RE: Need help with wing set for alpha trainer
Like others have said, they build these planes with the servo on one wing, to make assembly easier. All you have to do is join the wing halves and attach one clevis.
I maidened mine last weekend, and on my first landing (second flight) I came down a little hard on the nose gear and the firewall popped out about 2/3 of the way. I made a new firewall and epoxied it back in with tri-stock reinforcement. The guys at the field were surprised that it came apart, it really wasn't that hard of a landing. You may want to reinforce your firewall with tri-stock just in case. I hear this is a good idea for any ARF.
Good luck.