Look what I bought...
It's the 'is' version. I was going to get the standard NP101, but I found this one on the web. I bought it through a dealer who sold it to a customer, who then returned it after the first night for something bigger. It's in mint condition, but I paid the used price for it, so I'm happy I had the patience to wait for it to come along.
I am going to put it on a Discmounts DM4, but haven't bought that yet. In the mean time I will have to satisfy myself by looking at it rather than through it. At some stage I will put up a post to see if anyone going to IISAC has a mount I could use for an hour or two. The wait is going to kill me though.