Thanks guys! Was a fun project, I've got several more different folders in queue right now I'm looking forward to finishing up! I'm just thankful to Sal and the team that they provided me w/ a license to use the Spydie hole, they really have a great support staff and are an outstanding company! Actually, the spine is about the same thickness as the stock blade! But I see what you mean about the thickness not being a distal taper I actually bored slight recesses in the tang on this so it runs on PB washers so it doesn't scrape the sides of the blade when closing. At some point when I have time I want to send one made out of rex 121 to Bluntcut and have him ht it at 70rc. Love to see how that would perform =) Sure, I'm always learning. The lock face geometry is the tricky part but the para 2 would be more forgiving than the endura or caly is (being lock backs) Indeed. Fortunately I ground the lockface prior to ht, so when I went slightly too far w/ the lock face grind I was able to displace the metal slightly for a perfect tight lock up which the HT just solidified.