My furnaces are eating TONS of stone, filling their internal inventory with 500 bricks each.

Assemblers stop producing goods when their internal inventory gets a few items in it. But furnaces just keep producing. (Dectorio and/or ReStack make Stone Bricks stack to 500)

I've created a mod to reduce Stone Bricks back to a stack size of 100, but it's a crumby solution.

I'm looking for a way to disable a Factory building. Any way to use a power switch connected with green wire to an output storage container of the buildling? Maybe throw in a decider combinator? I'd google-fu this myself, but I don't know how the factory buildings specifically mix with circuitry.

Any help is greatly appreciated!

You could wire your stone belts to an output buffer, only letting stone in when the output buffer has less than a certain amount of bricks.

But how would you stop letting stone in?

https://wiki.factorio.com/Circuit_network