10 hours ago, Joe Censored said:My opponent then immediately concedes. I felt terrible.
...
I really thought he should play it out with me, and he still had an excellent chance to win, but when he walked away I felt like garbage for the next couple hours.
Was I being a jerk? Would you have let him change his dial to whatever he says he really wanted to dial in? Or would you have called for the judge like I did?
Everyone will agree that what you did was right, by the letter of the rules.
Going beyond the letter of the law is going to get into value judgments, so no one's saying you're wrong, but plenty of people are saying it would be the wrong thing for them, personally, to do.
A lot of people are also pointing out that this was a good learning experience for him; that he'll be sure to double-check his dials from then on.
Not many people have pointed out that this was a good learning experience for you, too. You learned how it feels to uphold the rules the way you did. From what I'm seeing, it's hit your conscience pretty hard. When you're saying a part of you silently would have been pleased that the judge would allow the change, that's pretty indicative that you only wanted him there to alleviate the guilt you felt. There's no need to call a judge if the rules are crystal clear. Why not just flip a coin, if that's how you felt? Let the opponent blame the result on random chance!
My sincere wish for you is that you don't allow the fact that you did the right thing by the book to mute your conscience for any future cases should this sort of thing come up.