The bench isn't done, and man did it suck up room quickly. I still need to put decks on both levels of it, and it'll need some shims to level it all out, but this was a good evening of work. At some point I should probably put some plywood behind all of this too, but since the stand isn't built into place I can always pull it away and get it done.
I also moved over the RO filter. Temporary location for now, as I know things will change pretty quick once I get the other tank in place.
I can't decide if I want the top tank to be RO and the bottom salt, or the other way around. Either way it's going to be a bit annoying to get at the top of the tank to get the salt mix into it. I'll either be crouching, or up on a step-stool. There's good points to either method. And either way is still better than hauling buckets.