And I disagree about not using the lockers without trying a route unlocked first.

Yes, using locker(s) is like cheating.
Yes, you 'may' learn a little faster/better not using them.

However the ability to go slow and not tear your rig up by using the locker(s)gets my vote.

And - lockers work better with auto transmissions. Auto + lockers = SLOW.

Let the flame wars begin.....