RC Plane Scratch build- Trainer type, pusher and KFM wing

seems like you have built a pretty strong little trainer. Try not to maiden planes unless you have gotten the CG correct or just a tad nose heavy to be safe although i think some of the plans may have them slightly nose heavy to begin with.

Not sure how a control horn came loose, if your using those plastic clevis's that dont clip together its usually a good idea to use a small rubber band to hold them together. or you had a control horn pulled out the control surface just make sure it has enough hot glue