Bas review's are due to most being made cheap in China.
As,far as ones that shake I have 2 an old Lyman and RCBS.
They both have 50 50 mix of corn cob and walnut media.
But have a Thumbs Thumber Model B USA made as well that has a hexagon barrel that is way better. I tumble bit wet and dry with different media's.
What size parts are you looking to clean and what are they made of?

[img]https://i234.photobucket.com/albums/ee87/fast340six/sig%20pics/2840886-340SIX-1.jpg[/img]
VP of the MPM in New Orleans
73 Dart Sport 340/ 70 challenger vert. That may still get built, If I live long enough