Re: Pottery wheel modifications for an extractor.
Ray, I am aware of the benefit of avoiding the central shaft/axle. But what Juzzerbee seemed to be asking, "frame stands on end and spins over the center of the wheel" implies that the center of the vertical frame is aligned with the rotational axis of the potters wheel. That is not how conventional extractors are designed.
The pottery wheel extractor would need to have frames equally balanced AROUND the rotational axis of the the wheel, not OVER it, to function similarly to conventional extractors. A radial design, with frames oriented like the spokes on a wooden wheel, is the best design.
I think it could work fine, if the design keeps the entire frame to the one side of the rotational axis (and the another frame on the opposite side balancing that.)
USDA Zone 7A Elevation 1400 ft