Kees, I've mailed you but let me know and I'll help you get a coticule for a decent price. You live in the Netherlands and it's not too bad getting one.

I like my coticule and have one of similar quality that Xman has. Although mine is a size smaller. For me it was a cheap, well working stone that I've used with everything I've honed so far at it works just fine without much hassle.