FE Hoppy--
The -500 series TriStar uses 9 degree null position for the spoilers, when landing flap selected. The stardard body aircraft uses 7 degrees.
Contrary to some folks thinking, it works really well. Suspect those that throw darts at the TriStar have never flown it.
Have to say though, it does require care and attention from the maintenance department, unfortunately some operators now ignore this very basic requirement.