Hi,
that is a marked improvement but is still pretty raggedy.
I suspect your spindle has too much runout to do a good job. I would suugest you look to improve your machine with a 24000 rpm
spindle. They (usually) have angular contact bearings and will bring the runout down to 5um or so. You don't need alot of power
for PCB's, 750W is more than enough. If you want to do wood or aluminum then consider 1.5 -2.2kW.
The Chinese made spindles are pretty good....for the money.
I use this one from Germany:
https://www.mechatron-gmbh.de/filead...08-24-ER11.pdf
Craig