RE: Airfield 800mm P51 rtr.. Tail is crooked / spinner wobbles / return?
A sharp knife and a bit of foam safe glue will fix the tail.
As far as the spinner, remove the spinner and prop, then run the motor to see if it actually the shaft that is bent.
Normally it's merely the spinner that is a bit off, which doesn't really affect things, but the shaft is a different story.