Work day 2, Wednesday Evening, 12/22/10 - 3 hour including cleanup.
I cut the transom out tonight. I first double checked my layout and did a couple of diaganol comparisons to make sure that both sides were identical.
The cutting...... I bought a non-ferrous metal blade for my Skill Mag-77 and then setup a straight edge with the correct offset. I made the one cut across the the top and it was a bear to keep it running straight. Don't get me wrong, I've framed a ton with this thing but that's what its best at.
I was trying to avoid using my Festool finish saw but I figured what the heck, give it a shot. Yeah, dumb me, there's a setting on it for Aluminum up to 1/2" and I had the right blade but forgot I bought it.
So here it is, the most accurate manual cutting system ever designed. Ya know, if you don't have one of these and you want to build a boat like this, you might consider saving for one. It'll set you back a chunk of change but it's worth every penny.. Here it is. The saw sits on a track and slides. The edge of the track is set dead on the cut line and you litteraly cannot make a bad cut. There are a couple of immitations out there. Dewalt (Black and Decker) makes one but the price is nearly the same and it's no where as good. Get the real Festool product or you're just wasting your money. WoodCraft is carrying Festool now, go try one out and you'll see what I'm talking about. I've got a whole stack of Festool tools. These are considered heirloom tools. You'll pass them down to your kids and they'll pass them on theirs.

Here's an example of how perfect the cut comes out -

Here it is all cut out and cleaned up. I use WD-40 as a lube. It works great and cleans up easier than PAM cooking spray.

I was feeling a little puffed up so I hung the transom on the form. It's just sitting on a couple of drywall screws so it's not exactly square or anything. That will happen later -

One of the things I discovered pretty quick was the amount of chips that fly everywhere. I think I'll put a fresh bag in my dust collector and use it. You can't really sweep the stuff up because it gets all bound up in the broom. A vacuum is the best tool for the job.