I may be mistaken, but, in this case the S is for 'Stand by! Your wallet is about to be accosted.' Not too sure about the N. But the F is for the first thing out of my mouth when I saw the price. Lousy oil lamp

The forward tank measures roughly 22 inches square and the bottom follows the hull form in that area. I'm going to run the baffels in a simple 'X' shape fore and aft and athwartship. A 10" diameter inspection port and cleanout hatch will get centered on the 'X'. That way I can access each section to clean or gawd knows whatever.

True to form, I way, way over engineered the water tank at first. Fortunately common sense kicked in and now we are looking at making a tank that provides what we need not some silly contraption with a top-heavy cost to benefit ratio. Ugh!

Dang! Just about forgot. The inspection port I stole from your chain locker design. so thanks!