Great writeup, Aces! Two other things to consider when I've chased similar demons: 1) Don't forget those things you've added that connect to the battery all the time but may not go through your fuse panel, like radio memory wires, amplifiers, and MSD boxes. I've found excessive drains from each of these things in some cases. The MSD one had me stumped for quite a while one time. 2) Don't use heater hose, fuel hose, etc. as an electrical insulator. These have a lot of lampblack in them, which is rich in carbon and is not a very good insulator. I thought I was really clever using it to insulate a battery cable one time but later discovered that with a meter I could actually measure some continuity from one point in a hose to another! Hose is great as a protecting cover over wire against abrasion, but the insulation must be intact under the hose.