so I'm a Line convert now, taking the Sakana to Loveland tomorrow for the first time, but also got a new set of 2011 Prophet 115, 179cm to mount up with new Marker Jester demos. I intend to use the Prophets mostly for high mountain wind-crust powder days. The demos will let me play with the fore/aft boot position but I'd still like recommendations for boot placement. Any ideas?
I assume you're wanting suggestions other than this, but if not, I was able to find the manufacturer recommendation. If these are your Line_Skis it's 77mm back from center. Maybe @Line_Skis can suggest alternative mounts for those skis.
Since you're using a demo binding, you have the option to play around a bit with your effective mount point on the fly. You could set them up so that your farthest back point is at recommended, and then you have the option of moving forward from there if you want to.