Only magnets, actually. The design is similar to yours; a top plate, four legs and a base.
I drilled four holes in the base and the top, holes in either end of the legs, glued neodymium magnets in all the holes (be sure to get the polarity right :) ). The whole setup is loose and can wobble a bit, but not enough to actually impede usage.
Jeg fandt en mod i går. Fik spillet et par dage uden drifters om natten, så ved ikke om det den rent faktisk virker endnu. Men den har klart sænket min irritation :D
Tak for at have sat mig på sporet :)