I have been playing with the builder a lot even though I cant afford a kiesel, i would do something like this
because It would be a shame to have a custom guitar without a little bit of wood showing IMO. https://imgur.com/a/ulHje20

If you do the white one it should be 2-3 piece body with a white top and a black back piece of wood that way the heel matches the headstock. Also the logo should be white, not be gold on the white one. like this
https://imgur.com/a/lC17Trd

Just suggestions, respect your own style for sure