Eric,
That's great news, you'd wonder how you ever did without it!!
I had mine out last new moon, the night started out dewy and later the temp dropped to -5c and everything froze, except my optics.
The newly installed (3 months ago ) secondary heater kept the mirror clean and clear.
I think it's a necessary addition to all reflectors and to all the G.S.O.'s that share the same sec holders as our scopes.
