Curious - how did you break the mag tubes? User error or defect? I could envision bending mine if not paying attention when inserting the rod in the mag tube and applying lateral force.I’ve had both guns and yes their customer service is excellent. I broke two mag tubes in the 44 mag bronze big boy and they shipped replacements right away.
It was a very heavy and pretty gun. Sold it and got a marlin 1894 CBC which is much lighter, although not as well made as the Henry, it is much more functional.