I had a similar, excellent, experience with CGW.
My 85 Combat is a tolerance anomaly, and after them sending several Race hammer kits, and me having issues with hammer follow, I sent my pistol to David so a pro could figure out the issue.
He sent it back working as it should, no charge. I offered to pay him for his time because i didn't pay for work, but he refused saying that he sold me drop in parts and I had done nothing wrong. The parts wouldn't 'drop in'. He even replaced a sear spring I had bubba'd.
They have a customer, and a friend, for life!