I can remember them from bitd but don't think I've seen one in over 20 years. We used to sell quite a few of them on the juniors and mini's but don't know very much about them other than not being suitable for bigger riders.
I do like the look of them though, I think MCS were very innovative and ahead of their time with their designs, it's got a real mid to new school look about it.
Nice bike though, where do you find these little gems?