I've just met a new owner who's bought a very nice 125 black Executive on eBay. He was under the influence when he was bidding for it and was more than surprised the next morning when he found he'd bought it! He was at the house of another former C1 owner (like me) when I called round to pick up a variator tool he'd borrowed. So we had a rare group of 3 C1 enthusiasts gathered in Bolton.
I've told him about the forum so he may join up. He's already made a neat replacement plate for the broken top box lugs which looked very sturdy, so he could be a useful member on here with that kind of innovation..