I would think they chose the non double ball end headless design to be able to use any standard electric bass string.
Most standard roundwounds have the same roughly 3/4" uneven winding near the ball, so if I had to guess, they have at least 1" of distance between the ball and the nut.
I am wanting to definitely find out for sure for my own database of fitments, so hopefully someone with a Kramer Duke can let us know what kind of strings they are using, and if I have them, I can measure the exact distance of that winding, and we can put two and two together.
In photos I've see it does look like it has about an inch of space. I just asked the seller to measure it for me before he ships it out. I've looked through the forums here on TB and others and it seems that most Kramer Dukes have round wounds but mine is a fretless hence I would prefer the flat wounds. Trying to get a jump on getting some strings before the bass arrives but I may just need to wait to measure for myself. Hopefully A Duke owner will chime in.
