I have the Gyroc Vibratory Tumbler, and have been very happy with it.
Indian Jeweler’s Supply had it for a good price, and were very
helpful with advice on media. The tumbler itself comes, however, with
precious few instructions. Expect to spend some time learning. Buy
extra belts. I use it for deburring sawn parts with quartz media,
removing scratches with another, and pre-polish with a third. Extra
bowls and lids for each media are handy- no need to scrub out
thoroughly then. You can polish the most delicate wire parts with it,
something impossible with a rotary tumbler. It can’t however, harden
silver pieces like the rotary tumbler with steel shot.
Lin in suburban Chicago