I have two main shafts on in the Heli and one that is straighted out and ready to go.

When I bend one I swap it out and then straighten out the bent one for the next time

My son picked up a used Blade CP for $100.00 and It had the shaft between the two blade grips that was bent I straightened that one out too.

I keep the broken pieces around and fix them when possible.

keep reading the forums there are a lot of good tips in here.