3 axis cnc/router bed

[dudz]

The existing bed has hundreds of vacuum holes, but only 4 tapped holes. The question is.....do I ruin a half decent vacuum bed by drilling and tapping it all out or make a new one ?. The vacuum bed is only 12mm thick, plus the plastic underneath which is 13mm thick.

[Jonathan]

Fair enough...
The easy option is to just get the 25mm aluminium plate, mill it to size and drill the array of holes in it. Alternatively use the same thickness, but mill slots into it then add strips on top (something like 1.1/4"x3/8") so that you end up with T-slots which makes clamping much easier. In addition this means you can skim the bed flat a few times, or accidently make marks in it without worrying too much since the strips can simply be replaced which wont cost much.