Brilliant, thanks for your help mate. Always wary about the language barrier with these things and them thinking you're just a clueless tourist who wants to try and get in for nothing!
Only done Efteling, but I wouldn't worry about language in the Netherlands. Most people dealing with tourists speak perfect English, and most of the general public seem to know enough to communicate to some degree.
Customer Services were confused by the new designs on the cards, but soon sorted us out with tickets.