When I was first starting out... I built some REAL ugly planes... seriously... you'd be surprised how great a poorly built plane will fly. As long as the wing and horizontal stab are square and at the right angle of attack... and the vertical fin is pretty much straight up... and the plane was glued properly... it will fly fine. (Provided it was built from an already tested kit... not a personal design) As for the hinge gap... on a trainer... it wont be going fast enough to really worry abou tthat. Maybe 50 mph? No problem.. as long as you glued the hinges in properly. Your plane will be just fine! Dont be so worried hehe