Can't really recommend this bot. I had it cutting sapphires and was planning to switch it to emeralds, rubies, diamonds, etc. At only 11 minutes in, I ran out of sapphires (didn't have many, just wanted to go through low level stuff first). I was going to let it finish the partial inventory before switching to emeralds. Instead the bot shuts itself off. There was no warning, no pause, nothing. It didn't even complete the partial inventory. I realize it is only $.03 but that is still just bad design.