Lots, and I mean lots, of RPs. 300 atm. And about 1k construction bots, and not that big a concrete production (that's also consumed by a rocket silo assembler)...

And the ghosts expire, so the concreep starts to look rather splotchy. And it doesn't look like the mod recognizes and handles that, the gaps stay. :(

It also just apparently assumes that enough concrete is available, and doesn't seem to check if the concrete has actually been creeped.

It's really expensive to check every roboport for holes in the concrete. But you can reset each one by picking it up and placing it back down. Ghosts should only be placed if concrete is available to fulfill them, so it seems the logic is overshooting and I'll look into it.