Trying to figure out a better way to clean the post and other plastic parts (obviously not "the plastics") when shopping out a pin. Anyone ever try tumbling them and if so what media do you use? Up till this point I have always wiped/scrubbed every single piece with a ME and alcohol. Fingers get pretty tired and it's just a tedious process. I thought of this last night while I was putting some of the metal pieces in my tumbler. Please share any other cleaning strategies that may be out there.....

Ultrasonic cleaner....I've not seen one. I just googled and I'm finding them in the $30 range. Used for jewelry...is this what I'm looking for? What is the best size?

Thanks, I predict I will own one of these before the weekend is over.....

Update:
I made the trip to HF and purchased the ultrasonic cleaner. I got the 2.5 liter version for $64 using a 20% off coupon (regular price $79.99). The first time I used it I was not impressed. I ran the same post through several cycles and still did not receive the results I wanted. After reading some other post about these cleaners I decided to increase the amount of Simple Green as I was only putting in a small amount. My new mixture is roughly 60/40 water to Simple Green. The results are fantastic! The additional cleaner made a HUGE difference. I can't believe I am just now picking up one of these cleaners. Well worth the $64. In fact, it saved me $25 just on this one pin as I was going to replace some of the parts until I saw how clean they could be, not to mention the ease and amount of time saved.