Monitor turntable

This is a turntable I created to allow me to turn a computer monitor without dragging it across the desk.  It's basically two wheels with a circular channel filled with 4mm ball bearings sandwiched between them (I used 70, which seems to be a good amount.)  I also created a rim to keep it together and help it blend in.

Note that the rim band sticks up 2mm above the turning surface. A larger base will hit the rim so it should be shortened or not used.