Gibbs Sandtech - Sanding Machines BS 750 The Gibbs Sandtech BS 750 is a twin-spindle Bobbin sander. The twin shafts allow a variety of sanding heads to be accepted. Features BS 750 The Gibbs Sandtech BS 750 is a twin-spindle Bobbin sander. The twin shafts allow a variety of sanding heads to be accepted. Features