Thank you all for your help. I am working on a chiller that uses Peltiers but as you can imagine that's a bit of a rabbit hole.

In the meantime I actually found single flute (0 flute?) 1/16 cutters

https://www.amazon.com/dp/B0BHW3NWJL...sin_title&th=1

using max spindle speed and aggressive cutting speed I am able to get through the material without drama.