Slider - The Straight Cut Guide
thingiverse
It demands a 2020 T Slot Aluminium Extrusion Profile. You can attach a Xacto Knife or Glass Cutter or even a Pencil with a few zip ties and draw/cut perfectly straight lines. It glides smoothly through the Tslot channel like a Tnut. Use some plastic safe lubricant such as Silicone Oil for smooth movement. I am using it to make precise cuts on EVA foam and Ikea lots mirror for my 3rd printing bed.
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