Jay, don't let yourself get frustrated. Just take your time, ask away if you're stumped(there ain't no dumb questions), and have fun. The anxiety of wanting to finish just makes the finished boat that much more satisfying. Hang in there buddy! Did you get the pics I sent you of how to install the stuffing box?
The sponson blocks are all the same thickness. Two are wider than the third I believe. The 2 long ones sit in the pre-cut notches of the tub's sides. The third (the short one) is expoxied to the "topside" interior side of the block that sits in the rearward notches. The third narrow block should slide in between the tub sides to lay flat on the rearward block's topside. The front block will be to high, so you will "block" or machine sand it down so its' profile is even with the bottom of the tub's sides. This picture is of the bottom side of the tub
hmmm, after looking at this pic, it looks like the stacked blocks are not even, but that a trick of the light. They should be lined up straight and true. In fact, pay close attention to keeping everything about the tub as straight and true as you can. No warps of off angles for sure. Try and use some aluminum angle, straightedges, various size wood clamps, FLAT table covered with wax paper, 123 blocks, heavyish weights (I like to use 123 blocks and mesh bags filled with lead shot for weights) to press down while curing, etc. to get things as straight and square as possible. You don't need some of this stuff, but my point is that you should do everything you can to keep it straight. I've stopped building at this point because I didn't have my hardware collected. Back on schedule now, just waiting on a teenie weenie drive dog.