If anyone is interested in the machining (drilling and milling) of CFRP composite in its many guises then you should have a look at:
Plenty of useful info and discussion topics
This is a little off topic but if anyone ever wants molds or plugs made out of solid graphite ( not the fiber type), this company in Tempe Arizona has experience making molds and such and graphite is priced cheaper than aluminum. I’m not totally sure but i think you don’t need much mold release either with a graphite tool.