I’m pretty sure you should be using the same wallet and key. The question I am trying to resolve is whether you can have the same /db and wallet running on two separate machines (harvester and plotter) at the same time. You would need to copy the plotter’s /db (and possibly wallet) to the harvester once everything is done. In theory, this should allow you to maintain sync for your OG plots while adding the pool plots and maintaining their sync. See my post here.