All great info Gents and thanks for your comments on this topic that I knew beforehand was for some a curiosity and for others a topic bordering on 'religion'. I'm on the wait list for the 4mm and 6mm SuperMono cause 'I gots ta no'. I also don't have any 4 or 6mm eyepieces so it also rounds things out for the collection that needs some new blood anyway. It may be quite a wait before they are actually made but again, all in good time and no real rush.