macduff agrees with some of saw stop's technology, macduff's simple technology uses existing table saws, large or small but has the fence fixed or in a stationary position on a sliding support platform that transverses the width of existing tables to give the width of cut, the fence will not flex or deviate and is always parallel to the blade, safety devices are all placed up front of the blade, not behind the blade!!!! are all automatic in width and height of material, will automatically hold pressure down and against the fixed fence, with the pawls in constant contact with the material at any adjustable position along the length of the fixed fence. many designs to choose from to suit the individual operation all on a work table 50 * 30 ins. slainte mhath macduff