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this works wonderfully. I worked it up to make it into a steampunk light switch to move a light switch sideways for light switches that are hidden behind bookcases and such. The yellow rack moves up and down and actuates your gearbox to flip the switch. The longer version reverses the action so up is on and down is off. This is actually a kit-bash of 3 different projects I saw here in thingiverse Thanks again!!!!