In that case, I suggest you save up your money instead of buying repair kits and buy a pair of G3s and not have to worry about breaking them.
Alternatively, there are modifications you can make to the tips to improve them. There's a post about using threaded metal inserts that you stick in yourself which make them pretty much unbreakable. When I find the post, I'll try and post it, but it's somewhere in this forum, I know it is...
Chiok