hedge, first off he has the bow to full brace so I know he's pulled it to 15", I leave my bows braced when i'm tillering and scrape where I need, but if you don't exercise the limbs they wont release their shape, and you stand the risk of missing target weight or messing up the tiller further, if you just scrape till it is even without exercising the limbs all kinds of things can go wrong.
actually bracing and unbracing a bow is bad for the bow imo.
don't know if that made any sense it's 2 a.m. and i'm tired