Dear Zen,
Go online to www.lapidaryjournal.com, search for my name, and my
article on tumble-polishing should come up
http://www.lapidaryjournal.com/jj/799jj.cfm
(from the July 1999 issue). There you can read my advice for using a
Lortone tumbler. It doesn’t take a lot of strength. They last a
long time.
All the best,
Judy Bjorkman