Ruler Holder

I have a Westcott brand ruler that's 3cm wide and 1.5mm wide. It's perfect for measuring both sides of my RepRap i3's Z axis and I lose it often.

This Ruler Holder, when attached with double stick tape or glue gives me a perfect place to store the ruler for whenever I need it. On the WanHao/Monoprice i3 you may need to file a small spot in the holder to clear the screws from the Z axis limit switch.

Other sized thin rulers should work with this design after scaling.