Just to be honest and fair...... Miha PM'd me, and corrected my mistake on the pricing.
Please see the first post for the corrected prices, which do, in fact, reflect the 15% group discount.
The prices of only the 2 cav, the two cab solid, and the six cav changed. And, was only a few EUROS change. Shouldn't affect any one's interest in theb group buy. Sorry for my apparent oversight.