Thanks Doug and Peter. I am inclined to agree. Having successfully designed and built a cooling system for my 1000D, cooling a MKII is really a job for CentralDS. If I was going to do that, I'd spend the money on a dedicated CCD.
Thoughts for the future. I like the optics of the FSQ106, the big focuser and the short tube - it fits somewhere between DSO and wide field with a reducer. But, it also means guiding and that is another subject altogether. If the focuser on the FSQ85 was more robust I would be satisfied with that and might get away without guiding as I have in the past.
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