OPTIONAL SLOT; INDEXING ACCURACY HORIZONTAL POSITION PLUS OR MINUS 10 SECONDS; VERTICAL POSITION PLUS OR MINUS 20 SECONDS; TILT PLUS OR MINUS 20; TABLE FLATNESS WITHIN 0.0005 IN; CONCENTRICITY WITHIN 0.0002 IN; 1 REVOLUTION OF THE DIAL DRUM IS 3 DEGREES; WEIGHTMAX 300 LBS