Feature Request: Comparator output from Block Breaker based on presence or lack of item in inventory

[kamacarnelian]

I would like to be able to turn the block breaker off when its inventory is empty, thus avoiding wasting blocks by slowly breaking them by hand when the hopper above it runs out of tools. I am currently using a comparator output from the hopper, but it would be preferable to have it output from the block breaker directly. Let me know if this is possible or if the block breaking status is the only thing it will output rather than inventory fullness. I will be happy to be able to change it via a config file or in-game checkbox in the block breaker's inventory screen.