I make the majority of my jigs from either aluminum or acrylic / plastic, because I live in the tropical weather with 90% humidity, and making anything out of MDF or plywood wouldn't last a week without warping and changing the shape / dimensions. I designed a very easy to make Aluminum Drill Press Table, which is built with the side wings, to allow aluminum profile extrusion fence travel along the table's edges. 40 mm = 1.5 inches tall fence allows the chuck to go very near to the fence. Should I need a taller fence, it's very easy to slide any attachment into the slot of the aluminum extrusion profile. There were times when I needed to use very long drill press fence, and I simply swapped the extrusion for the longer one. I use the same model of the aluminum extrusion in many of my projects, which makes them modular, and lets me combine the jigs or components together seamlessly.
For example my bar clamps use the same aluminum extrusions, so theoretically I could attach my bar clamps to my aluminum drill press table.
The bar clamps build video is here:
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