Thanks Volund. I would be happy to answer any questions. The stainless steel hinges on the side doors work very well, I highly recommend them. The hinges for the hatch requiring the custom hinge blocks were a bit of a nightmare to engineer, but they work like a charm.
The cutouts on the bulkhead did not seem to weaken the structure but the cabinet units are indeed epoxied in place (both to the bulkhead and galley floor structure). The cabinets, cabin shelf, and galley floor add additional strength to the bulkhead as well. None of the cutouts on the bulkhead went higher up than the gas spring mounting points so I haven’t noticed any flexing. I’ve also upgraded both gas springs to 30lb versions with no problems.