That looks great and it's pretty much what I had in mind for Sirocco, if I can ever get that big gas tank out. I had also thought of mounting a small diesel tank in the laz, but I haven't thought it out and don't really think I'd like it. Here is a picture of my engine bay right after the A-4 was pulled and I'd scrubbed a bit. You can see the gas tank to the left of the prop shaft. I also notice that your port cabin drain runs through a straight thru fitting that looks like it would accommodate a hose from a galley sink. Take a look at mine, which is a seacock that I can't open. I pulled the hoses and about a quart of rank, vile water spilled all over me. Gotta try to figure what to do what that thing too.