@MS Thanks for the reply and feedback! My 65.25 XT is now at 6.849 (tips), 2.496, .712, wing at 9. I tell ya, the ski shape at the tail makes DFT really hard to measure, but the upside down ski trick you shared reallly helped get more consistent readings.
Moving the fin back a little seemed to help, as did moving my bindings forward a notch since the exact front boot measurement (28.75) put me between holes on my HO bindings. However, I still haven't gained anything course-wise with this ski, and the XT seems to just take more effort over my old 2010 67" HO S1. I weigh ~170, ski Right foot forward, get into 35, and my only other thought is that I might need to be on a 66" XT.
Thoughts anyone?