Stan.
While Ive never had a rib to shoot loose I have had a bad bend in the rib of my MX20 that they repaired and had to reblue the barrels. They did a great job and was reasonable on the time line. Cant remember exactly how long, but if it had been very long I definitely would remember.

Giacomo has also fitted different barrels on guns for me and other work. Overall Im a satisfied customer.

If I had one complaint it would be the first person you talk with when you call. Not very helpful nor knowledgeable. Also dont bother emailing. Seems she doesnt check emails but every couple of weeks.