Hi dave glad your getting on ok with coti i think you should stick with just coticule and get the best out of that. it will get better the motre you use it i don't think your nakayama will do any thing your coticule carn't do i have had several coti's and they all leave a smooth edge the only differance i notice is with slurry i sent you this message as hi bud can get hi rate when it comes to coticules what he says about 1 in a thousand i would take that with a pinch of salt.