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Well, I was going to use the plastic shaft from a previous Halloween accessory. The kind you still find on store shelves with red trident heads or other things on top.

But it looked too short. My daughter spied a length of copper pipe I had lying around and it seemed to match her scale close enough. So I used that. (I did need a couple winds of tape to make it snug as I didn't have time to print another...)

You can change the r value in the Shaft() module to match what ever you choose.