This is bloody great! That's given me new ideas for mine too. I wanted to do a rolloff roof but I never like the idea of having the walls left around the scope. I just love the idea of having the scope going through the door when you open and room to slew without sides limitations. Genius! Now I'm thinking of having a closed PC room in half of the obs and the other half like yours with walls and roof that will slide over the PC room, like a telescopic obs. And the telescope is outdoors on its own platform. No drama with thermal.
... and no need for a pier. Just use my tripod too as Fred mentioned. Champion!