Bent Frame, bent k member

So I should call back the body guy and tell him to leave the k member bolted in and straighten it all up? I don't want to come across as a know it all jerk on that phone call. If he wanted to drop the k member to straighten the frame, is that just the best way to do it, and it'll be fine if I give him the green light to make it good enough instead of best?
Obviously every body guy is different but just trying to get a feel for it

Unibodies with welded-in crossmembers are straightened without removing them. With that said, the k-member could also be straightened off the car. I'd be interested to know how far off it is. Like I said, I've straightened one that was really bad, but I did separate the two halves, but I don't have a 20-ton or more frame rack.