If your Lexan body is cracked or split you can repair it and keep it from getting worse with a little effort. Secure the crack with a piece of mesh drywall tape then coat the entire area with Shoo Goo. Once cured, the Goo provides the wounded area with just enough flexibility and support to help prevent further damage from future crashes.
Fiberglass Cloth -with- Epoxy Resin actually works better and is stronger. It can be sanded if necessary.