One more trick, and perhaps this should be mentioned on the tools and tricks thread. When I started to remove the screws that held the stringers to the stem knee, the first one snapped right off. It was stainless and will be buried, so it will be left, but wanted to avoid doing that again if I could. I was using a small hammer drill, which has the torque, but does jolt it pretty good. Sometimes it breaks loose but sometimes it snaps off the screws. What to do to avoid snapping screws?
To anyone who has spent much time on the boat building threads, especially woodenboat, you are probably familiar with the name Bob Smalser and his expertise with old time tools. A long time ago, I was reading a piece by Bob about the best tool to use to install or extract screws and that was an old time brace. A brace would allow you all the torque you would ever need, plus it goes slow and you can actually feel when the resistance starts to ramp up. It also turns out that modern six sided driver bits will fit into a brace chuck with no modifications needed.
With the brace, I managed to pull all the remaining screws without breaking any of them. Moreover, they came out like they wanted out. It also worked like magic to set the depth of those side panel edges to allow you to align the edge of the panel to the chine edge.