I have an aerobird challenger with about 20 flights.
The wing is repaird with 1/4 x 1/4 x 14" oak.set into a groved out chennel on the bootom wing side.
it is held in with hot glue and expoxy filled the top creases. This holds up great in loops and dives.
The V-tail has a cross dowel mid way up and guitar sting up at the top.
It seems I have about three trys to get a good launch or the plane will turn and dive. like it is stalling. When it is up the glide time seems a little shorter and faster. I have also notice it has been less responsive. Tonight I have moved the lines to the bottom holes in the horns.I am useing the sport mode. Pro mode is to jerky for me. I hope the lower holes in sport mode is a happy medium. The wind was dead in the large field but it seems I was fighting a wind at 100' If I made the plane dive to get speed,it would then turn.
So..Would this wood and glue.expoy and stapping tape make this plane that much heavier?
I do top off the batts. an hour or less before flying.
I have a new tail and wing but tring to get the most out of them.It is kind of fun working on them.
Thanx for any input.

Several things could be aggravating this. Weight is one for sure. When you make repairs or when you build, think strong and light. Carbon fiber is lighter than wood. Also, as you add wood and tape make sure you are careful about wash-in and wash-out (these can drastically effect the stability of flight and cause the wing to stall easily). Wood tends to warp, as you well know, and gluing a warped piece to a wing or any other surface can warp the entire surface. Gorilla glue works well for me if you want strength, but I must admit I do not know if you can use it on foam.

In general it sounds like you have gone a little overboard with your repairs and mods.

Tom