Thanks for that. I use the GSO 30mm Superview which I really like, but I am sure that the pentax would be sharper. I was light-heardely considering what I would get if I could... I Am sure Televue will take this to heart

and was diappointed by the (relatively) narrow field stop reported for the Nagler. If they improved their 31mm Nagler Field stop to 48mm that would allow 2 degrees in my scope which would be fine! Thanks for your serious comments though - I am thinking about where to from here.
cheers