I got in a batch of used but genuine rotating ring inserts from Japan. Old watchmaker's junk drawer stuff. Many interesting shades and finds, and some new questions too.
PSA: This video contains sub-optimal levels of editing, usually none. We have zero script, no planning, no real editing, nothing. Same for the sound - I forget my microphone pretty regularly, so if you can hear *anything* count that as a win. Even if that "anything" is tuneless humming. I did pump up the volume though. YMMV if you choose to blow part of your life on this. No Refunds. Enjoy!
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No ammonites were harmed in the making of this video.