Roll-off roof observatory near completion

Been working on this during the winter months. Finally got the roof on and almost ready for my RC 12.5. Details of construction at: http://home.earthlink.net/~urbanimager/UIOB.htm

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Looks like your on your way. I wanted to use the same roof as you, but, wife prohibited, had to be roof like hte house, lol. when u say one ton of concrete, yea I say feels like 3 or 4. the grunt work,lol. Good luck finishing soon. Brian