So, I have done a bunch of searching and there are many discussions regarding binding delta, toe lifts, etc. Many of those threads also have broken links (as they are old) and I wasn't necessarily able to get an answer.
I have new boots (Rossi Experience Sensor 130LV-same as Lange RX) which are much more upright than my previous boots. Due to limited dorsiflexion and poor flexibility I have an 11mm heel lift in the boots. All canting and fit issues are done.
I spent yesterday groomer zooming on my MX78's. They are the only skis I have that carry over from last year. I am finding that the so called "sweet spot" feels like it is now rearward on my boots instead of under the BOF. In order to power through a carve, I have to sit back.
Based on my reading, I think I need to add some lift under the toe piece of the bindings. Let me know if this is wrong thinking.
Is there a way to determine how much lift is needed? I know I can experiment with something stuffed between the boot and AFD plate, but I can't imagine i could fit more than a mm or 2 in there. I have read of people needing 5+mm of lift which would not be a quick experiment.
Not to totally confuse the situation, but I also downsized from a 327bsl to a 316bsl and only adjusted the heel piece, so the boot center is now a few mm off too.