No, I don't think that's being dense. No harm in 'over' tillering by an inch. But, if I tiller a bow to 27", that's how far it's been 'taught' to bend, and it's safely been to that point many times. Drawing it past that point is something I don't recommend. All else being equal, more weight & longer draw generally equals more set. Not always, but usually. It's just not the way I begin a bow build. If I want 27", I tiller to 27". During the process, I'm sure there's times I pull the bow past my intended draw length by small amounts, but I always have a goal in mind from the beginning. Also, if I'm measuring someone's draw length and it's 26.5", I'll definitely tiller their bow to 27".