[sanddrag]

This is a nice easy to manufacture transmission design but the problem is that there is very little->no reduction. In high gear it is 1:1 which means you have to use some external reduction like a Dewalt drill gearbox and on the input end then maybe some sprockets and chains on the output end. Don't forget about all this stuff when looking at how light and small it is. What you see in the picture is not the only part.