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Working on the most recent iteration, # 25 I think. My goal is design of a kit. These globes are 2" in diameter right now. I'm going to scale up soon, but I've still got a few tweaks. The bearing sleeves throw off the accuracy around the poles, and they are a bit awkward to put in. That problem may go away with a larger scale.
I'll post the first and last of the series soon as a before and after type thing.