I would suggest that you do not. Please allow me to explain why. Extreme stylus shapes, like the one on the OM-40 are analagous to a screwdriver head, thin and with sharp edges to the sides, a standard elliptical stylus, as found on the OM-20, is more oval shaped. With the extreme cuts, if the arm is not at exactly at the correct height, the edges of the stylus do not meet the groove completely flatly, this can actually recut the grooves compromising record life as well as shortening stylus life. Unfortunately, the BSR does not allow this height adjustment, though there are Mickey Mouse ways of changing the angle of the cartridge in the vertical plane, with shims, they are quite imprecise. The OM-20 has an elliptical stylus and the edges are rounder where they meet the grooves, this means that they are much less critical of this vertical tracking angle adjustment and will be a better bet. My experience would suggest an elliptical or conical stylus on this rig. Not a MicroRidge, Van Den Hul or Fine Line. One more proof that you may need the guidance of a good dealer more than you think. Just my two cents.