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I have a robofocus unit fitted to my FSQ106Ed and use temp compensation. It is a requirement with this scope.
I also live in an area with probably the biggest shift in temprature or close enough in the country but while daytime tempratures can be as high as 25 during winter and overnight minimums down to -4 it has to be remembered that by the time I start imaging the temp has usually fallen to 0 degrees already so a variation of 4 or 5 degrees is not an awful lot. On most nights I only require 2 or 3 temprature compensation changes during an entire night. if I use the focal reducer I need a few more. f3.6 is just too fast.
The thing which must be remembered with these 10" scopes is that CF or aluminium tubes is probably of no concern. The mirror cell and the front of the tube are connected with huge slabs of Aluminium top and bottom. In reality you are probably better of with the Al tube as there will be less wear and tear on the aluminium to aluminium surfaces with equal expansion coeficients than Al to CF with difering coeficients. Focus changes can be compensated for with hardware and software but wear and tear cannot.
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