Just adding my five bobs worth (don't know how old this thread is) I got the QX with my 112" LB and the first time I tried it, I was not impressed because of fuzziness around edges -- HOWEVER when I tried it a few days later on some large clusters, I was absolutely blown away with the view - I could not even see any noticeable fuzziness. I think the first time I tried it, the mirror had not come down to temperature, so air currents stuffed it up.
I now call the QX my "Cluster Buster" and use it all the time - it is almost my favourite as I just love those open clusters.
