i'm using two of Gary's original 220V motors mounted to a simple "temporary" plywood box manifold which is connected to my PVC plumbing system (ever since my last Fein gave up). I have the other two motors on the shelf but haven't had time to set up the fancy new four-motor manifold so they are just sitting there as backups right now.
I cut full sheets of melamine and plywood with few problems as long as I take a few steps, like ensuring that no small parts near the edges of the sheet get cut last. I keep small parts away from the edges, make sure the small parts get cut first when there are a mix of small and large parts on the sheet, and try to separate small parts to leave a web of waste around them when necessary.
I also use the two motors to cut solid wood parts down to just a few inches square on a single 24 x 24 zone by nesting them against an "L" shaped fence which is butted to the table stops, covering the rest of the zone with 1/4" one-sided MDF (or anything non-porous), and taping all the seams with blue masking tape. Rigid masking boards work better than plastic sheet to cover the rest of the zone because they provide great resistance to sideways movement of the workpiece. Taping it all together (with the vacuum running) makes the whole thing act as a single workpiece, giving you effectively the surface area of the whole zone to prevent sideways movement.
Using a down-cut bit leaves enough chips packed in the kerf to keep most wood parts from moving or losing too much vacuum, plus it applies downward pressure as it cuts. I can count the number of times I've had to use tabs in the last five years on one hand.
