Ablang asked;

Has anyone ever found any recipes online or built their
own?
If so, what would be the easiest way to do
it so that one can buy groceries, haul recyclables, or
get a pizza, etc?

Hey Ablang - Do a Google Search and you'll find quite a bit of online
resources from basic designs to DIY parts (bikesatwork.com)

I applaud your DIY attitude over those who think it's "tough" to beat
the products of Chinese Slave Labor.
Umm, let's see. Do It Yourself or buy cheap crap from China and
continue to feed the energy sucking monster driving up the cost of
living of free people around the world.

Good Luck Ablang & Best Regards

Mike Baldwin