No. By the time I had 90 repair and could get Jury Rigging, I didn't repair anything for the rest of the game, and my PA was still at 28 DT (after almost dying repeatedly), my Anti-Materiel Rifle ended up at like 60% condition (not bad at all considering how many rounds I fired off), and This Machine was at an astounding 95%.
It seems like the only time I had to repair anything was when Boone quit using the AM Rifle and I fixed it so he would keep using it. And my repair was so high that I never needed repairs. I mean come on? I think if by that point its pretty useless, then it should be available at like Repair 50 or 60. then it can actually be useful.