So now that I have over 50 post and I am on the bottom of the train list. What type of things get sent. Or how exactly dose it work? Is it just someone sends me something and I take it all out and fill it back up and send it on to the next person? Or is it every one adds to it and takes only what they can use leave the rest and sends on more of there own stuff with it? My question is what happens to the left over stuff that now one wanted at the end?