Blades and Blade Tracking
That's bad news ifyou're cutting notches into the root of the blade... Modifiying your blades is a big NO NO!!!! They may seem allright but They're not!!! Tiy're gonna get bit if you do that.
One thing you should cehck after a crash is your Spindle..... They always bend a little..and the main shaft. Take them out and roll them on a flat surface to make sure they're still true.
If you're still just learning to hover then don't wast your money an an expensive set of blades as you'll probably crash again before you will even be able to get any benifit from the CF's (with the exception of balancing)
Just my nickels worth.