I think part of the trouble in getting a group buy for CPC together is that there is no cost discount relative to doing a similar set yourself (if getting a small set, I guess there is the fact that you wouldn't need to meet minimums, but that's about the only bonus I can see). For me... I I'd love a set of these, but I'd want it on the diamond square mold. And I'd probably choose a different spot pattern on the 500.