'Doc wrote:
It can certainly be done. The hardest part for me was figuring a way
to lock the thing in at the top. Wound up using a spring loaded bar
that slid into a corresponding 'loop' on the hazer. The rest is just
simple and not so simple mechanics, sort of. You might think about
putting 'rub' buffers on the hazer, some kind of plastic or whatever.
Good luck.
- 'Doc

skateboard wheels
or
inexpensive casters

Pick ones with the right materials and loose tolerances (so it doesn't
rust and the inevitable crud doesn't jam it)

OR... high density polyethylene (poor man's Teflon).. cutting boards are
a good source.. quite durable, easy to cut to make rub pads or rings or
forks.