Manual transmission pen. By Maker B. 14:42 video:
tuchie (Apr 12, 2024)
This is outstanding. I was contemplating the gears and thinking, This would be even better if each gear was a different pen color. Then of course that became so. These could be a goldmine. Write a few good CNC programs, crank them out, sell at 75 bucks.
Easily make six figures profit (after buying and installing the machines) in the first year. Sell as gifts for engineers, mechanics, automobile enthusiasts...
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