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I might have helped myself out actually. I did some googling after I gave up last night and saw it referenced that the T6 was a 7 element design based off the original Nagler arther than the 8 element design that is more common now. A bit more googling found me a patent filed by Al Nagler himself in the late 70's showing a 7 lens arrangement quite like what mine has.
I will get some cotton gloves and take it apart again and clean it gently while the elements are out and then re assemble matching the arrangment on the patent. That only leaves the spacing up to chance and hopefully I can get it back in order again, there are only two spacers to play with. If that does not sort me I will give Cloudy Nights a try.
It does make me think seriously about the advantages of the ES line being sealed. It would avoid the potential for the internal fogging. The Nagler is the only one that does it, I have a Meade SWA that I bought from another IIS member and a couple of Televue Plossls plus the Celestron Plossl that came with the scope, none of the others suffer the fogging to any great degree and it usually only seems to be the eyelens where the Nagler goes out in the middle of the pack quite early in the night. With all the others the corrector plate is usually gone long before they fog.
The other "Next thing" on the list might have to be a dew heater for the scope with a second belt for the EP to keep it above ambient and keep the mosture at bay.
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