Groetjes Bram.
Whereabouts in Holland can you ride trails? I'd guess you don't become an expert with hill climbs over there ;) My family's from Rotterdam (and surrounding area) and my husband's is from Amsterdam. We keep being asked/told to come over, but other than going to watch MX, can't think of any reason to go (except to see family, of course & fresh herring with onions - sorry I can't spell for the life of me in Dutch, but mostly understand it & do speak it when necessary).
But I guess it's not far to Belgium & Germany & other countries.
As for pix of KDX's, check out the KDX site:
http://justkdx.dirtrider.net/