About this 3D model

Gimbals with a letter in the middle. All letters are more or less fitted and centered, but you may want to adjust them further using the `.scad` and OpenSCAD. TODO: * allow more than 4 rings * fourth ring a little loose * allow attaching gimbal sets together, or a gimbals stand See also: http://www.thingiverse.com/make:90021 http://designmaketeach.com/2014/05/06/3d-design-personalize-a-gimbal/