I paid $40 I believe. But it was also not in line with anything and they drilled into the barrel because they left it in when they drilled. So...maybe $40 was not enough for quality work. I've since filled in the holes with some jb weld
And I'll add Brett knows what he is doing. It's not his first rodeo. Cheaper isn't always the best value. Especially when it comes to a non reversible modification.
And to be clear, Brett isn't the only guy in Indiana that can do it. I'll just say make sure the guy you deal with has a good rep. Like he does.