Hey 9sec,

I usually try to save them, if the damage isn't too bad...I just peel off what will end up flapping around....that is, anything that's on the leading edge of the blade that's going to catch air...

And then try to use a bit of CA or super glue, whatever to secure the covering the best possible...it'll be OK, but might not last too long, depending on the damage...but the heli seems to fly just as well with a bit of the end of the covering missing, have done it plenty of times, it's a shame to just throw them out...

Sometimes, I'll put them aside for practicing things that I think might be risky...like my first backflips, for example...I have a special battered up canopy for the same reason...lol

It will throw the blade balance off a tad with the missing covering, but not much...alot of people don't balance blades anyways (I always do), but if you are the type that balances blades, you might want to rebalance them to compensate for the missing covering..

Hope this helps..

Glenn