Pretty well! Using some cheap 2mm endmills from amazon. I ended up doing the top with estlcam’s “free machining” and then doing the holes and the outline in 2D. It’s been working well in paper and linen micarta, too. Though the bits don’t last too long.
One strange thing I haven’t figured out: my material is a very consistent 3.45mm, and I want the part to be about 2.6mm. I use the estlcam option “shift downwards” to take a little off the top. But to get 2.6mm from 3.45 I end up telling it to shift downwards 0.3, not 0.85. Even though my other Z measurements seem to work fine. So that’s a bit of a puzzle.
I’ve been doing this zeroing on the top of the piece but wonder if I’d be better off zeroing on the bottom (my materials all start at different thicknesses). But then I don’t know how to knock the extra material off the top.