When playing with BZs mods (very BZ), F2Inception gives processed graphite. It should give flake graphite, as that's what comes out of miners.

Also, I'm not sure if this is possible, but it could be nice to have "multipliers" for the belts coming in. As diamonds normally take 15x longer to mine. So it'd be nice to be able to do a setting so that you don't get a full 15/sec input. But you could maybe set a divider like 5, so you only get 3/sec, etc. Could be a way to let players balance their own run a bit depending on their mods.