I'm no metal-working expert, but of course I've got opinions anyway (like everybody) on this.
I think the bracket can be bent back to a useable shape, but you need to be very careful about it. You want to:
- bend over a large area, since bending over a short distance will probably stress the metal too much and crack it.
- apply carefully measured force, slowly. Too much force and it might snap all of a sudden.
- just get it into useable condition; don't try to make it perfectly straight again.
- try to bend it against some kind of blocking in order to control what bends where. For instance, take a board and
cut a hole in it for the motor to poke through. Then clamp down the arms that already lie against the board and
carefully use another board to push the bent arm back down. Push near the bend (as if you are trying to unroll it)
rather than at the end of the arm (which may just bend the end instead).
I've read contradictory posts about whether heat helps or makes it worse (for aluminum). I'd go without.
All of this is just theory I'm spitting out. I have not tried this myself. Your mileage may vary, etc.
If you've already bent it back and notice cracking, then you can reinforce the weakened area with epoxy.
Just rough up the surface a bit to give the epoxy a better grip, then layer some on and let it dry. To make
it stronger, you can apply some material on top of the epoxy. Since you probably don't have any carbon
fiber mat or fiber glass mat, you might make due with some tyvek (from those envelopes that can't be
torn).