It's being fabricated and you're just doing the installation? Then just dry fit it, and if all is well then remove the slab, place several dollops of 100% silicone adhesive on the cabinet frame, then reset the slab on the silicon. I'm guessing that this slab has sink cutouts. If the stone yard is just giving you the slab, consider making a litter out of a couple of 2x4s and a sheet of plywood to fully support the slab during vehicle transportation. Depending on the slab you can use the litter to help carry the slab into the house. Carry it on edge versus on the flat if possible.

I've placed a few dozen Pentair variable speed equipment sets into service since they came out. The oldest is probably 4 years old this summer. I had my best luck with the 4x160 controlled by an Easy Touch 8. The VS3050 controlled by an Intellitouch 7 or 9 was way over my buyers heads in grasping the technology the controller offered. They had difficulty following the menu's for configuration. I'll admit they offer a bunch of avenues but IMO it's total overkill for residential pool customers. I only had a few service calls on the units and have no idea what the problems were because I just dispatched the call to my local Pentair rep and they handled them. To their credit they were a lot more prompt than they used to be back in the late 90's and early new millennium. I switched to Jandy in summer 2000 because of the poor after the sale warranty support from Pentair back then. It was a shame 'cause I was a long time dealer for PacFab before Pentair took the line. I've only placed 7 or 8 of the new E-pump equipments sets from Jandy and had 2 service calls on them, one I ran was a cracked impeller and the other I'd have to ask my super what the problem was. I suppose I'm the last builder on the planet to jump on this bandwagon, I still prefer a 2-speed for those looking to enjoy electrical savings, guess I'm just old school. This pool isn't going to be an E-pump, we were working within a budget and I had to achieve as many of the things they wanted in that select amount. See ya, Kelly

Ask your AHJ. But it’s a wack idea. There are certain efficiencies built into a linear process. Turning a process on its head for no good reason will cost you in ways you have no idea about. Money can make a lot of weird things possible. But just because you can, doesn’t mean you should.

Is taht a gas FP or wood burning? If gas I don't think you need a hearth at least where I live it is not required. If you must keep the hearth then frame it I guess . Some pics from further back would be a good .