Serious question, how long did it take you to stop cutting the grain the wrong way on spines?
I was making a case binding for a friend's cookbook in my garage in Boise and the spine board kept warping after about a week on the shelf. A retired binder at the local guild meeting picked it up, ran her thumb along the edge, and said "you're cutting this with the grain running the wrong way, honey." Turns out I'd been lining up my cuts with the long side of the board for two years because it felt easier on the board shear, and the boards were fighting me the whole time. Now I check the grain under a lamp before every cut, and my spines have stayed flat for three months straight. Anyone got a quick way to spot grain direction on the cheap Davey board when the light is bad?