Reply To: Anyone own the M-3PX model? home › Forums › General Discussion › Anyone own the M-3PX model? › Reply To: Anyone own the M-3PX model? March 19, 2024 at 7:52 am #1813 RWParticipant Not an owner, but do have some information. Note the reference at the bottom and that the “M” stood for “Millennium”. In terms of height and width, it fits between the current M545 and M645 models. Attachments:You must be logged in to view attached files.