I cheated and built tube-like hulls for the pointy bow and stern, and just a curved top for the top midships. But Glenn is right, the model has VERY thick hull and you can waste a lot of time trying to make anything fir. My bow/stern p-hulls are actually rectangles, with the curved top and bottom, the only way to fit (and I over-cheated for extra clearance). To me, putting in super detailing on the p-hull is like making a Faberge egg, and then hiding it under a colander. When you look thru the tiny holes, even with a torch, you can barely see anything.
But it's wonderful there are so many different methods, all shared here, and that so many boats DO have p-hulls!