They're all over the place, of course, and have dozens of characteristics
and quirks.

I remember two things (From how long ago I will not mention!):

1. A MASSIVE foot powered wheel that seemed to hold momentum forever. No
power required except the legs. Are these antiques, (or at the very least)
vintage now?

Any DIY possibilites?

2. A little kick lever powered rig with an aluminum top wheel, that seemed
to want to fly apart when you were pedaling it up to speed, and DID NOT hold
momentum.

Well, there are now a myriad of these little electrical ones all over the
web, and they do look simple, but I want something that just doesn't
vibrate.

They look so light that I have suspicions.

Any Help?

thanks.

Buck

(P.S. Good sources of equipment and raw materials in the SF Bay Area. Tools,
clay, glazes?)

Thanks Again