I sent a 27-year-old drive in for repair that has been modified from standard. I didn't actually hold out much hope of a successful repair as I could not provide details of the modifications that had been done to it. I should not have been a doubter! On return of the drive I did have an issue when I recommissioned it. BUT the after sales service was excellent, Northern Industrial re-collected drive, resolved the issue and had it back to me in a few days. No company is perfect, but the way Northern Industrial dealt with and resolved the problem was excellent. I would use them again.