Vectrex Joystick Thumb Stick Replacement

This is a basic model of the thumb stick on the joystick of the Vectrex game console.

Please note that, as the product of a discussion on the Usenet Newsgroup rec.games.vectrex, I'm uploading this on the behalf of Jason who designed it. More information and an alternative download location (for members) is at this link:
http://vectorgaming.proboards.com/thread/645/reproduction-joystick-pieces-sharing-documentation

By the way, I notice that "avrgeek" uploaded an OpenSCAD model in 2011: ht