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That's a wonderful shot Humi. Congrats on the new gear.
I just got a Robofocus with a special mounting bracket for my FSQ and I think it is well worth it as the FSQ has a small critical focus zone. Focus will also shift with temperature changes noticeably so keep that in mind. A temperature drop of 2-3C will mean focus will be slightly off. 5C change and it will show noticeably out of focus images.
I like the FSQ106N over the ED version. There are many similarities, but the 106N seemed to be able get richer colours - not sure why that would be but its definitely noticeable when you have used both. The 106N also has the better focuser and focus lock. The ED has better backfocus and better colour correction (the 106N has excellent colour correction).
As to getting -35C I found with my STL -35C seemed to be the sweet spot for the chip and noise. Not a lot of improvement over -30C but dark current on typical CCD chips halves every 6C drop in temp. Images seemed a tad cleaner. -25C though is a temp you most likely will achieve year round. Also my STL cooled to -43C below ambient which was better than the advertised amount of -40C whereas other cameras I have had always fell short of advertised claims. -25C is a useable temp and means you can have one set of darks that can be used almost all year (except maybe one or two hot nights in summer).
Greg.
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