I'm 19 hours into the build. That includes 3 hours today completing the deck and carving the bow stem piece. I used oak for the back deck stringers (1/4 in x 2 in) so that they would be less likely to crack if someone big wanted to try getting into the kayak. When installing the stem I placed a square amidships to mark the center, so when I looked down the hull I would be able to tell if the stem was crooked. Funny thing was I had a lot of trouble getting the stem "straight" according to the measurements. It turned out that what I marked as the center was an inch off. When I lashed the stem tightly in place it straightened out by itself. Today's lesson: Trust your eyes. They are more sensitive than rulers. If it looks right, it probably is.