I have a Birdview now, but for my first big dish - an 8 foot solid aluminum -  I bent it back as much as I could with a come-along.  I finished with a 1/16 stranded wire and two cable clamps. I had actually installed the dish but had to take it down for the straightening. For this procedure I had it on the ground, facing up.
The dish had a flat flange that went around it.  I attached some big C clamps to the flange on opposite sides. That's what I hooked the comealong hooks to. Of course I was pulling it in the direction it needed to be straightened.  On both sides, next to where I attached the comealong,  I drilled  little holes  put a small bolts with washers through the flange.  I used those teardrop shaped cable loop things on the ends.  The loops went over the bolts and were kept there with washers as I tightened the flange bolts.  I tightened down one cable clamp. I left the other clamp loose.
I pulled with the come along, pulling the loose end through its clamp to snug it up. I pulled until the wire was above the string going in the cross direction about a quarter inch. I tightened up the  clamp and took the comealong off.  When I did that the wire came a little toward the string.   To get it the rest of the way, I held the short end of the1/16 stranded wire as I slowly loosened the little cable clamp.It reached a tightness where it slipped back a little and the wire touched the string.   I tightened it upand got much better reception thereafter.