I'm thinking once through the bin and then out the door into a hole in the garden for cherry pits and peach pits. Mango pitts eventually crack. Corn Cobs maybe once thorugh and then out? What do you think?
i'd leave the corn cobs in the bin. they aerate it nicely, and they do eventually break down after a few months (unlike pits, which i don't even both throwing in anymore).
corn cobs and avacado pits go thru twice. Hard pits last on. Pete