Hey, sorry for the slow response.
I don’t have a build guide yet, but would make one if there’s interest. I was also thinking of getting custom PCBs made to solve the rats nest on the side.
So far I haven’t had any issues with Z levels, it’s gone to the same place each time regardless of tool. Mind you, I only use a quarter inch end mill, an eighth inch end mill, and an engraving bit (which I haven’t actually tried with this system yet). The capacitive response is exponential in the last couple tenths of a mm as it approaches the endstop so I haven’t had issues with repeatability independent of the tool used.
@Doug_Bailey I’m not sure what a vector to design page is, can you elaborate?