Yesterday, we had hard skier packed, skating rink in some areas, chalk on the edge of the runs and sun warmed softness in the afternoon. After reading this thread I decided to try the Apex on the line instead of 1.5 back. It definitely shortened up the radius and made the skis more playful. I liked it a lot and will probably use that setting for those types of conditions. I also want to try them in the powder with that mounting point just as a comparison. I'm thinking in softer stuff I'll leave at -1.5 but on hard pack on the line is the ticket.
glad I could help indirectly.
I actually put a look binding w/ no movement on mine in the end. I find i second guess mounting too much if I'm tweaking too much, so I leave it on the line and make adjustments to technique.