hmn, vang and traveller... I thought until you knew how to use those you weren't allowed off the lasers, what you doin on a big boat?....
IMHO finer points would be outhaul, cunningham, backstay, leech lines, barber hauler, rig tune, telltail break points for different conditions and points of sail, twist, etc. I think I actually adjust my traveller and boom vang more often than my mainsheet.