I use an old kirby vacuum to power my vac-hold-down table using a 2" iron pipe base plate attached to the vac and the large shopvac hose. I made a grid to route out the MDF using turbocad (dxf) and created the toolpath using deskam and then drilled 3/16 holes in a sacrificial piece of particle board. The idea is from shopbot where you can download files for a full 4' x 8' but I only made mine 12" x 48".
Tom |