Either way, locking tuners ought to have only minimal (if any) wrapping; usually only measurable amounts of wrap if you use a floating bridge and need to keep re-tuning up when replacing strings.
If a slot tuner was locking, I'd think the locking mechanism ought to still be 'higher up' on the tuner, to avoid the string hitching on the center hole; on the other hand for stringing ease, it would be handy to have a lock in the center, so you could just: stick, lock, bend, tune. Not sure if what I'm saying is coming across properly.
Btw, it's amazing how few online purveyors of guitars seem to know how to string slot tuners any more. Always great when you hear a guitar received a 'professional setup' and see the string ends sticking out...
(Happened when my dad got his G&L among other instances) :