that will help save your battires when u hit the ground I dont know where you are getting your fiber glass at but here in denver where i get mine at it is only 30.00 bucks more to go carbonfiber an 15.00 more for cevlar here's a video of my B1B lancer I made out of carbon fiber and my battrie lived though this and all of the b1b crashes being the batt cost more than any thang else in the plane it's nice to have carbon fiber on you side

[link]http://www.youtube.com/watch?v=o7o3PluwMMA[/link]