Something I'm starting to see a LOT off, especially repairing after a crash, and that's replacing balsa tail feathers with coroplast tail feathers. Some of the combat kits that are otherwise not plastic are also going to coro tails. JKAeroteck has gone to coro tail feathers and ailerons. Why? Because a perfet gap-less hinge is only a simple knife cut away. The cool part is the stuff is already colored and fuel proof.