I've been using a model M for years* and somehow never found this forum! I recently been trying to get in to trackballs so I joined here to hawk watch the classifieds for a DT225 (seems to be a rare event though), as well as to see about designing a modern trackball with all the features we look for in modern mice.
*Lexmark blue label, with key caps, drainage holes, detachable cable, and speaker hole. Good lord it is certainly due for a cleaning!
