A couple of years ago I called Leupold to get my VX 2 changed from hunting knobs to target knobs. I think they usually charged $120.00 for both knobs but they were running a special. I paid $80.00 . I shipped the scope to them in an original box and they had it back to me in less than 2 weeks. If I had it to do again, think I would do only the elevation knob. I don't use the windage adjustment all that much.
Just thinking...currently that scope sits in the safe collecting dust.
Your mileage may vary.