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I like the concept, but am having difficulty understanding how it works. If there is a smaller section which roller/folds into the larger section, how do you see zenith. If the sections are each half, then zenith would be obscured (a little) by the fixed half. If the fixed section is less than half, then the smaller section would need to be bigger and necessarily fold down inside the dome below the horizontalmounting ring on which the system rotates. To my mind, this configuration would also present weather sealing issues.
Grateful your comments on how you overcome these issues.
I need to find a roofing system for my developing observatory so am interested in the detail.
Cheers Brian
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