Hi friends, sit here and note all manual processes to make some of them automatically for the pcb process. Now the pcb are cutted and milled 
That board looks really clean. You can tell no timing belts were used in milling that. Did you get tabs figured out in the Eagle BRD widget? I would maybe still mill those tabs down 50% and make then narrower.
@jlauer why you hatin’ on timing belts? 
Cuz the accuracy of them for super detail work like PCB’s is not good.
And I think it’s important that knowledge is out there because early on I thought it would work well for me and I wasted lots of money figuring out it didn’t work.
Yeah the result is realy better as with my old machine. On the holder code im working now to make it perfect.
+1 for tabs (I think that is what you mean by holder). There have been many requests for that functionality.
I fully agree with @jlauer ​ and @Frank_Herrmann ​. My first board has been milled with ballscrew machine and it was great. I think we cannot guarantee repeatability needed on a pcb level using belt driven cnc hardware.
John, I already invested some amounts to learn my lessons, so you are not alone 
I use a LPKF circuit board milling machine daily at work. It has acme thread but does use spring-loaded nuts to minimize backlash. It does a fantastic job. I feel like a belt-driven one would be okay if it moved slowly enough that vibration and belt stretch weren’t an issue – or if it used linear encoders on the x and y axes.
I can just say, don’t play with a belt’s driven machine. I had for 3 years a shapeoko and change to a cnc3040 after some hours frustrating try to make my timing belts more accurate. After a weekend i gived up and order my new cnc from a chinese store here in germany. After 48h i got this in my hands and i love this machine!
@Frank_Herrmann Just out of curiosity, was your Shapeoko using GT2 belts or GT3?
Got first with MXL belts, then i change to mk2.