Ed: I've discussed this with you before but to rehash it.....
Forget the STM and the Thumlers Tumbler. The hot and cheaper setup is the Frankfort Arsenal Tumbler / stainless pin kit for $170 at Cabelas, $160.00 at Graffs plus your old dry media seperator (rotary style), a couple 5 gallon buckets, your bathtub / laundry sink and a bottle of Dawn dishwashing liquid and a bottle of Lemishine (liquid or powder).
Don't forget the Frankfort Arsenal retrieval magnet (makes collecting pins from the media separator a snap from the bottom of the 5 gallon rinse bucket too.
The FA wet tumbler holds way more than the Thumlers unit and has a built in timer too. It comes complete with 5 pounds of SS 304 (slightly magnetic) pins and a sample of cleaning solution that I never used.
It's direct drive (no belts like the Thumlers and unlike the Thumlers/STM package, each end of the barrel on the FA tumbler has a clear window to watch whats going on inside (it's kinda interesting to watch, Additionally, on the FA tumbler you can replace the clear end caps with included strainer caps to rinse the brass off and keep it in the barrel.... I just dump mine in a media separator and rotate that.
It removes the pins and then I rinse the brass in a bucket and spread on a cookie sheet and dry in mom's oven on low for 15 minutes or use her (when she isn't home) dehydrator...either way works just fine.
The cases are as clean inside as out and the pockets and flash holes are like new. They don't get as shiny as dry tumbling but it's cleaner and twice as fast. I can tumble range pickups from the club that are green with age and in an hour, look like new (probably workhardened though)....
I think it's a better deal than the Thumlers / STM package, it's certainly cheaper and you can get replacement media packs on Flea-Bay if, you are prone to loosing oins..... I'm not. The magnet makes sure none get away......
Amy can keep the dryer sheets for the dryer, don't need 'em.
The wet system is basically twice the cost of a dry tumbler initially, but you never replace the pins and you don't need polishing compound and primer pocket prep is a thing of the past so it's really a wash in the end (no pun intended).
If I was getting into reloading, I'd just go the wet route and forget a vibrating rumbler or ultrasonic cleaner entirely...IMO.