RE the keel stem joint, I carved it out as shown on the plans, but I'm not happy with it. I think in the future I'd just do a scarph rather than that ugly step joint. Not a big deal for now, it's not something that will show in the finished product.
Figure 41: Keel clamped in place and nailed to station molds.
Figure 42 - Temporarily clamped keel-stem joint
Last night I had a rough time, and I think I've experienced my first major setback. On the plans it said that I should router a rebate (rabbet? I never know which is technically correct) into the transom to receive the hull planking. After much fighting with the router and bit, I managed to rebate the transom at 1/4" deep using a top-bearing flush-cut bit and a template cut 1/4" smaller than the outer edge of the transom. The result was less than awesome. A lot less than awesome.
Figure 43: Template for the transom rebate cut.
Figure 44: Rebate is on a bad angle. Man, that looks shitty
So I'm not sure what the plans designer had in mind saying "this rebate can be cut with a router". Granted I went a bit too deep with it (ie depth from the inner face of the transom), but still...maybe they were talking about using a top-bearing dovetail bit? Something like that would have looked much better and the strip would sit flush at least.
Now I have to figure out what to do for fuck's sake. It's only 1/4" gone from the transom, and from the angle of things. I think I could probably still mill away the remaining material, then bevel the slightly-small transom so that the strips lay flat. Worst case, I could just make the transom again and forget about the fucking rebate.
I dunno, maybe the third option is to just live with it and hide the gap using a fillet later. I'll consult the forums before doing anything drastic.