i have both sets . i have the 1k,5k,8k,10,12k. plus i have coticules in a thew differant sizes, 8x2 is a nice size. i have to say i use my 600 diamond plate for serious bevel setting other than that i use my 1k naniwa which i like very much the 12k does leave a nice finish that i also like, and as said it should take no more than 10 to 20 laps. having said all that i have not used the full system that much. As i go straight to my coticule after 1k and it seems to do a nice job also after that i supose i could finish on the 12k saving me some laps on coticule. so i would say get both if you can aford it . if its mainly for touch ups and just a little beyond that i would but coticule or 12k naniwa. your choice. if was me i would buy coticule