Ok PCB milled now how to drill the holes ?

[HankMcSpank]

OK yes I can see the advantage of this, especially on larger boards. for me it wouldn't be worth it, the only boards I do are 100x 100 max.

The boards I make are typically even smaller than that - 70mm x 40mm ....I mill relatively small traces for SMD (SOT23-5 is as small as I go) & being able to probe is essentaial with a V cutter to get decent track width result.

Z Probing allows me to essentially disregard how flat the copper board is (& the inevitable clamping 'bow')...but more importantly I can disregrad how uneven the machine bed &/or spoiler material may be.