Austin sent his Mark folder back with Mark to the shop for some love, sharpening, add a swedge, and whatever else they talked about. @Nathanthemachinist and he were scrutinizing it at the show. I would love to hear what they (Mark and/or Nathan) noticed through their eyes at first glance, and what they see and find once it's taken apart. They appeared to be enjoying scrutinizing it at the show....
By most peoples standards it has been used very hard, daily for over 2 years on construction sites and farm use, hunting use, as well as traveled through the American west at least twice. It's been hit upon with a framing hammer, vise grip, pipes, and numerous other implements for "batoning" through steel straps, PVC pipe, copper, etc.... It's been a chisel, screwdriver, wedge, shim, snips, splinter remover, and who knows what else when I was not around....
This knife meets all the criteria "if there is any" for my definition of a "hard use" folder. Austin said he feels naked without it, and has been carrying the original Field knife scout style until this beloved folder returns. His "big" folder is his Miller Bros folder. That thing should come with wheels!