Well, I made my first error today. Yesterday, I had to scarf two narrow panels together, to make a bottom panel for the port ama. I measured carefully, and missed it by a mile!
Oh, well, stuff happens. So, to recover from my folly, I scarfed in a piece of a scrap off-cut, to the forward end.
It’s curing now. Hopefully, I’ll get it right the second time. By the way, you’ll notice a belt sander in the upper left corner of the second photo below. A master-builder friend of mine uses this to make his scarfs. I tried it, and it works like a champ! You have to proceed with caution, but it can leave a clean taper. I did some final tweaking with an ROS and a 60 grit disc.