There is a problem with the Burner. It starts to dispose even of fuel once its fuel slot is full (e.g. once it has 200 coke as fuel the inserter inserts coke into the burner which then disposes of the coke), but I only want to dispose of e.g. bones once the circuit condition to send bones to the burner is met. Am I missing something? Is there a way to burn anything but the fuel used to do so?