Keyboard tray edge/ wrist rest/ mouse pad clip holder
thingiverse
Extend it to whatever length you require in your slicer. This clip holds a gaming mousepad (thin ones) to a standard keyboard tray (0.629", 15.99mm) Also makes a nice wrist rest for your keyboard hand, infinitely better than a 90 degree wood edge. Print it with a brim and rotate it to print vertically.
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