....there's one screwdriver in the world that exactly fits that thing - that being the one they put it together with.
That screwdriver is in Germany which makes field service a tad inconvenient.
The idea of handmade 'perfect' workmanship is not lost on me. I 'get' that part....
My guess would be that it is not a one off slot with a matching one off bit to fit it. It's likely a machine cut slot to some in house standard. All it has to do is appear 'fine'. For a very few dollars, I'd think some torx screws could be sent along with the gun with the buyer having the choice of which set was on when the gun is delivered.
That particular example appears to have 'fine' English rose and scroll engraving. The roses of the 'fine' engraving look like torx heads to me. While the scroll is 'fine' in its size, there's almost no shading. Maybe, it's a price point gun?
