I like what you did to the sheath. For the record, that is a pocket/neck sheath from collectorknives, a pretty good guy and retailer for traditional knives. They won't be offering more once they sell out. The pocket slip that will be available for these, made by John's brother I believe, is made from thicker leather and has a lot more retention, easily rivaling kydex.
Worldwatcher
has that one as that's what the sick nasty is contained in. No water forming needed.
For steel, we're sticking with 3/32" O1 tool steel. It's roughly an upgraded 1095. The standard handles will be black micarta, but the 2 pocket woodcrafters I had made for prototypes are osage orange wood as I will likely gift one and I wanted one to keep for my personal knife. I was actually surprised how much I liked the scandivex one that you have, as I tend to like saber grinds most of the time.
The plan is to keep stock of the black micarta models and if people want something with a customized handle, we contact John and see where he's at with his production schedule and work out a custom that way. It would be a lot more like ordering from him with the wait list and all that, but you get a lot more options for customization. I plan to keep the models I design on hand as best as possible. Black micarta has traditional been the most popular which is why we chose that as the material for the in-stock configuration.