Homebrew PCBs

> Also it is uses those horrible cheap
> unsupported rails 
> with Oilite bearings. In the middle of it's travel that
> thing is going 
> to flex and bend all over the place.
> 

guaranteed, but only if you put a 3HP router on the Z axis and try to cut through steel.
if you use a reasonable router and don't work metal, the flex is unnoticeable...