Vacuum Clamp Pod Kit w/T Bolt, Fold Down Knobs, Vacuum Hose, Barbed Brass Fitting, & Vacuum Gasket – CNC Clamps for CNC Projects, Routed Signs and Plaques

I like these a lot, but I'm not sure what to do about the tubing. I want to set up multiple pods with more tubes and valves and use 1/4" OD tubing that is compatible with quick connect fittings and valves. Other than that, they are great, I like the button valves on the top that allow you to use only the ones you need without disconnecting the ones you don't need.Edit: I found that 3/8" OD tubing is compatible with the 1/4" OD tubing system that is included. looks like I can use as I had intended. I'm going to try this https://www.amazon.com/gp/product/B07RTB9K9N/ref=ox_sc_act_title_1?smid=A37DFQ476WZ5XM&th=1 and see how it works. I'll come back and give a report of how it worked out.

If your wood is not perfectly flat it will hold the product down. I thought there were be more power to the vacuum than there is. At best you can only run four pods and even then it is questionable. I have been using mine as a triangle set up. I also spilt the lines and added an adapter so I run a Paralleled system. This gives each pod the same amount of vacuum whereas in a series system the vacuum continues to decrease from pod to pod.

Clamps work but early indications are they have limitations in application. Purchased two sets of two clamps planning to use them on sheets that are larger and found that four clamps do not work out well. Parts appeared to be flat as one would expect high end plywood, but slight out of flatness raises the part on one of the four clamps breaking the vacuum seal and rendering that set-up useless. I have not tried to use three clamps to machine with yet but three hold the part since it is assured contact on all three clamps. Two clamps also work on smaller set ups. Just need to keep in mind possible limitations if you want to use four clamps. I am concerned that using four clamps will always be hazardous. If you are carving a large part and during the process it warps the wood, which I have seen, then the part may raise off the fourth clamp causing the whole set-up to fail due to the loss of vacuum seal to the whole clamping system.