The confusing thing is we use the same class names for different classes , it's to confuse foreigners (and each other) you know! Z would be graded as * level. They use the FEI * dressage tests and the height limit is 110. Difficulty-wise I'd rate them well above the average Novice, I did one as prep for a *** and it did the job fine!
Sorry, I got a bit excited there - we have probably crossed paths on more than one occasion. I am a total novicey gimp but OH is very much on the Belgian eventing scene.
I am sure we must know some of the same people..........?
Do you come down South much? Arville? Mont-le-Soie?