Homebrew PCBs

> I have access to some CNC equipment (Taig with a
> www.CNCOnABudget.com's 30krpm spindle).  Lining up the PCB to be
> square w/ the axis is difficult.  Does anyone drill the PCB before
> they expose it, or before they do the tonor transfer step?  I'm
> wondering how this might work.


If you put an X or + in each of the corners, say, where you will have 
mounting holes or something, you can line one up for your 0/0 mark 
and then verify that your board is to scale by going to the other 
corners.

it is MUCH easier to drill after.  

Dave