I needed to set my MakerFarm Pegasus printer on a wooden desktop, and didn't want to scratch it with the raw aluminum 80/20 rail, so I needed soft feet that would protect the desk while keeping the printer from sliding off as the mechanisms move back and forth. I had a set of six 12mm stick-on silicone feet in my toolbox, so I decided to print six feet and use the silicone on the bottoms.

MakerFarm Pegasus

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I printed them in black ABS to match the black anodized 80/20 rail, but you can print them in whatever material you have.

The MakerFarm kit came with a box of M5-.8x8 socket cap head screws, so there is a recess designed to fit those screw heads. Slide the T-slot nuts into the bottom rail, locate the feet at the corners or other places that need support, and screw these in. I located the last two beneath the side vertical supports, near the Z-axis motors. Mounting these required blind T-slot nuts.

After tightening the screws, stick the silicone feet to the bottoms.