I hadn't seen the first one, nice! Well, the only way to cut back is to make the end-game kb, which will also be a Dactyl for me but I think I’ll buy it from either ohkeycaps[1] or cyboard[2]. cyboard also does measure-to-build[3], it might entice you if you decide to buy it ready-made instead of building yourself.
[1] https://ohkeycaps.com/products/built-to-order-dactyl-manufor...
Oh! looks like there's a OpenSCAD parametric dactyl now (1) I think this was the clojure one I was playing with before: (2)
1: https://github.com/pseudoku/Dactyl-It-Yourself-Editor
2: https://github.com/l4u/dactyl-manuform-mini-keyboard