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: See also: http://www.thingiverse.com/make:90021 http://designmaketeach.com/2014/05/06/3d-design-personalize-a-gimbal/ Successful with PLA, 100% infill, no raft, and a sticky platform, see attached .x3g files. Prints in 15-30 minutes. See "Made" for an example of a failure with number of shells=3, 10% infill, and insufficiently sticky platform.