The best reinforcement method I have seen is someone taking this mesh tape, (the kind taht is used to put at the bottom of flower pots to hold in dirt, but let through water) and sticking it over the crack, or wherever. He then used Shoe Goo and put a good layer of that over the tape. When it was done, the thing was very hard, and obviously not going to break, even in a hard crash. Over all, it worked really well!
-etzkev