Toilet seat wobble fixer.
This bushing shims the bolt to the toilet so the seat won't wiggle so bad.
People keep asking me what is a 3d printer good for... One answer is for fixing that annoying toilet seat that moves around every time you sit down!
Parametric scad file. Take some measurements, key them in, and print 2 of these out. The brim is so it won't fall out of the bottom of the hole while you are installing the seat again.
Update 2012-12-23 Added offset to allow for elliptical usage for seats that don't exactly align to the center of the stool's holes.
Don't put too much pressure on the ceramic toilet bowl or you could break it. Snug's perfect.
Truth be told, my printer has some backlash and I had to use a vari-bit to round out the bolt hole so it's perfect.