Just an anecdote about a Princess 39. I recently had to replace the float switch in the gray water sump on the boat. The sump is located in a bilge area under the electrical panel that's located in the aft guest forward bulhead. The float switch and pump wires had been trimmed to 6" and led into a junction box that was hidden behind the sump. The thing had clearly been assembled prior to the deck portion being assembled to the hull, and there was only enough access to reach the box with one hand and operating blind. No way to get another hand or head in there. I had to use an endoscope and my phone camera to watch and guide my screwdriver tip into the 90° cover release fasteners and then guide another screwdriver to the fasteners that held the junction box to the deck. Having released the box attachment, it was possible to see and release the electrical connections, but just barely due to the short wires. Unfortunately, when the sump overflowed, the water ran down the short wires into the junction box. Since we caught the problem early enough, there was no corrosion damage and were able to dry, clean, and protect the connectors. We ended up moving the box to a more accessible spot and fastened it down with adhesive that would allow removal when the Rule float switch goes bad the next time. Incidentally, we always write the purchase/install date on Rule float switches so that we can return them when they fail in the guarantee period. Hopefully, those issues have been fixed in production, but there were multiple faults that could have been anticipated during the build. Probably worth mentioning, too, is that the Princess 39 uses a lot of plastic wood-grain coated 1/8" plywood or hardboard in a hollow core construction method. Some bulkheads are like cheap home-type hollow core closet doors.