Trackmaster II RS - Roger Sanchez Signature Model This model falls under the RM category as it carries an eliptical super high polished diamond. This model will satisfy the needs of a beat mixing DJ. The best Cartridge gets even better Matched pair (MP4) versions of the Trackmaster II Roger Sanchez model are now available in a new 4 piece package all wrapped up in a small road-worthy aluminum "flight case" with a clear plexi-glass top. The new MP4 packages include 2 matched cartridges and 2 replacement st...