Hi All
I has/had a plan for a pcb mill cnc, however I have I think to heavy rails, I have THK and Rexroth types whith quite big cars, type R163121420 8,5 x 7 cm and this is for a pcb mill quite big.
I do not now if one such rail is enough for a A4 bed, seen the big heavy rail, or maybe sell them all and use the round rails everywhere is seen, these are maybe more easy and enough for
pcb milling.
for heavy work there rails are fine, see picture.
regards