If you plan to rebuild your axes, invest in new motor, for example FME (Kress) FME 1050 - 1.
Also In my opinion, 10k rpm is not enough for milling traces with such small bit 20k+

schnittwerte1_8_sv_en.pdf

I usually only drill my boards on CNC, but prefer to chemically etch them. Quicker, easier, no extra unhealthy dust :)