Abstract: A modular base plate system is for use with a CNC machine for holding workpieces during manufacturing. The system includes a “turret-style” base plate having a plurality of stations positioned around the side of the base plate. Each station comprises a U-shaped pocket machined or otherwise formed in the base plate sidewall. The base plate system further includes a number of fixture blocks that fit in the pockets, with each block having a holder for holding workpieces. In operation, workpieces are attached to the fixture blocks, the fixture blocks are inserted into the pockets, and the fixture blocks are removably secured to the base plate. Then, the base plate is affixed to a CNC machine in a standard manner, e.g., using a pallet or rotary table or the like. In this manner, machining operations can be performed on a number of parts in sequence before any part changeover is required.