Regarding separating the pins from the cases, this is my method.
Get something like this.
http://www.amazon.com/ChefLand-Stai...1434569752&sr=8-8&keywords=stainless+strainer
When tumbling is done, I just dump the entire contents of a barrel in to this strainer. Then just spray some water over the contents to rinse a little. The strainer keeps the pins from escaping.
Like most other folks I have a media separator, exactly like the one pictured in post 44. I dump the contents of the strainer in to the separator, close it up and spin.
There's a trick here though. I fill the bucket part of the separator with water. If the brass is wet, which of course it is, the pins stick like crazy just due to cohesion. If you immerse the brass and pins in water, that cohesion is negated and the pins just fall away as you spin the separator. It happens almost instantly though I do spin it for 30-60 seconds.
Towel off the brass and dry. I use a toaster oven dedicated to brass. 150 degrees for 30-45 minutes dries everything.
The water immersion is crucial to remove the pins. I've never needed a magnet for the pins. I just leave them in the separator bucket and pour out the water when done.