[aliswe]

I'm more into the lines of "how would this be improved with least amount of effort and most value"?

[WJW]

Honestly as long as it remains human-powered I don't see a lot of value to be gained. Humans just don't generate a lot of raw power.

The quickest way to improve this system would probably be to attach it to a set of wind turbine blades or a waterwheel, but "how to build a very poor wind turbine" is not nearly as catchy as a blog post title.