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Nice base, Fred!
Two observations:
1. Instead of brackets and the associated electrical differential causing breakdown /rust, I routed a groove in the base and dropped the ring into that.
2. A year later i ripped that out and replaced it with a hoop of rolled tube, with skateboard bearings. Almost no friction, can turn it with one hand.
Getting tube rolled for my 3m diameter dome cost only $158.
Neville
LSO
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