I don't know what LTO is, but Hightime/Lowtime self adjust is just like your SAP I think. Every month, when seniors go on vacation, go on med leave or any of their trips drop, the flight attendants can go in open time every 20th of every month and change their crappy trips for more desirable ones or pick up extra trips. We can put 85-100, 90-110 or 100-115 when we do our bid. The junior flight attendants camp out in the training centers and airport to change their schedules and it's first come, first serve. I don't like this system because they hog the computers and some of them are like vicious dogs. They are part of the "cartel" and they change their schedules among themselves exclusively. Then after they change their schedules, all the crappy trips that they don't want goes to relief holders (what you call the secondary line holders). I hope we go on seniority system with this one (It used to be before the contract, then they changed it).