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HI to all! the video itself explain all I want to say about the difference between the same ratio obtained with worm gears or with normal gears, the first are really useful in lego and allow to build really particular stuff, but.. they have a lot of friction. i was really surprised from how much difference there is in the power output of the two mechanism, and it is directly proportional to the force the system has to generate: i test them with an !kg weight, and while my version works fine, the worm geared-one fail to lift it! thank you for watching, hope that this video will help someone of you to make better mocs!