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  • $\begingroup$ Does not matter. (+1) for nice solution. $\endgroup$ Commented Jun 21, 2018 at 17:36
  • $\begingroup$ @xzczd beautiful. Let me show you mine since you showed me yours. I've got a picture of a hand-fabricated approximation that you just disproved. $\endgroup$ Commented Jun 21, 2018 at 20:43
  • $\begingroup$ @xzczd OK, I'm adding a picture of my hand-test to the original question as long as a write-up response (character limit won't let me do it here). Let me type it up for a few more minutes. $\endgroup$ Commented Jun 21, 2018 at 20:47
  • $\begingroup$ @xzczd - check main post in a few minutes; editing to show progress. $\endgroup$ Commented Jul 3, 2018 at 17:59
  • $\begingroup$ @xzczd - still working on mold, will add pic to main page in a few minutes. $\endgroup$ Commented Aug 14, 2018 at 16:59