I doubt it's the "winglet vs non-winglet" stab trim setting. We're talking about 0.2 on the trim. With that old-fashioned trimwheel, it's not even possible to set the trim within 0.2 if you ask me... Looking from left side it's bla bla, but if you check it from the other seat, yeah, then it's something else...
Early, fast rotation sounds like an idea... Maybe, associated with slight tailwind - and (I don't know the runway) maybe uphill slope?? Good ingredients for a tailstrike I would say