Most things can be straightened....the main shaft I used to place in a drill chuck on a big bench drill...then rotate by hand and give the correcting 'tweak' till it runs more or less true
Feathering shafts can be 'tweaked' till they are pretty straight....I have flown the hawk with less than perfect shafts and its run ok....no shakes or nothing.
If I could get Nitro fuel easily I would run the Hawk and nothing else...well maybe a Falcon or a Raven becuase quite a few parts are the same....like the main shafts...I would suspect.
I got a Predator gasser now....its quite large...scary to fly at first....needs plenty of respect.
I do wish I could get a 50 size that runs on petrol....or even a 30 size.
Rob