In the knife world when we say a knife "walks and talks" this describes the actions of a pocket knife when opened and closed. The walk describes the feel of the tang as it moves along the spring when the blade is opened. It should be silky smooth without dragging or any rough spots or catches. The talk refers to the sound of the knife when the blade is closed. A well adjusted knife "walks and talks" (has a nice strong snap and has blades that slide smoothly across the springs). In other words the parts move together like the proverbial "well oiled machine".
The Billet Box has this walk and talk in all manner of it's construction, from the battery fit, to it's sliding door, the positive feel of the voltage wheel, the fit of the tank. To have anything standing proud in a knife is bad, it means parts don't fit flush with each other and again the Billet Box excels, everything, each edge and joint are as close to perfect fits as is possible. The fit and finish rival that of any of my custom knives who prices near the four figure mark.
I actually had a dream about a Billet Box, in it I envisioned a steel version that had been engraved and case colored hardened with the inlays of scrimshawed ivory. Even had a scrimshawed ivory drip tip.
For any mass produced (I know that term is stretching it in relation to the Billet Box) product to have this level of fit and finish is almost unheard of today. I can buy $200 dollars knives all day and find flaws in the fit and finish on them that don't exist on the Billet Box. The only other PV that equals the tight fit is the BAM, the joint between the two halves disappears when screwed together. It is a simple tube however with a single joint. DD has managed to bring that level of fit to a much more complicated design.
Well done.