Teradek sell a set of gears and also individual gear sizes to work with older PV glass. https://teradek.com/collections/teradek-rt-carte/products/motor-gear-full-set-pack-of-4-0-8-wide-0-6-0-5-0-4?variant=2720237846554
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Teradek sell a set of gears and also individual gear sizes to work with older PV glass. https://teradek.com/collections/teradek-rt-carte/products/motor-gear-full-set-pack-of-4-0-8-wide-0-6-0-5-0-4?variant=2720237846554