Itching for a finer stone than my UF Spyderco (easy to find) I'm looking at shapton and Belg coticule. Most say the coticule (yel) is about 8000 grit, some say 12000. Right now my repertoire is the spyderco's finished on UF (6000-8000 in my estimate), would it make sense to purchase the coticule, or the 16000 shapton's?, I always finish with Alu OX- on leather, then strop.