Gravity Gauge

Use the Gravity Gauge sign to display the current day's gravity forecast. When kept up-to-date, your sign will tell people when they can bounce around in low gravity, or if they should stay home when gravity is unbearable. The original sign was designed by [Miguel Marquez](http://miguelmarquezoutside.com), who allowed me to post the 3D version here.

Miguel's version has LED lights, this one uses a two-piece sliding indicator. If the arrow is not snug enough to stay put on the sign, attach so