[Tropo-Bob (Bob)]

I am pondering if I should upgrade my 1992, first series Nagler 7mm with a Nagler 6 whilst they are on special. My understanding is the newer series has 2mm more eye-relief (12mm verses 10mm). Anybody aware of any other performance issues between the EPs that may make the upgrade desirable. (I tend to favour using my Naglers with long telescopes, particularly my 115mm Vixen F7.7).