I'm not sure how much backstory to add, as I don't want to bore anyone. I'll try to keep it short, but I am very willing to discuss any of this or get additional information/pictures/etc.
Almost exactly 2 years ago, I was in Salt Lake City, and my wife wanted new boots. We went to Sports Den, and they helped me out, too. My feet are different that most, it seems. I have a wide toe area, a skinny heel, and larger than average calves. It is always hard for me to find footwear (even shoes or hiking boots) that feel good. I often find that my heel lifts out when I step or that my toes are cramped.
The guy that helped me immediately steered me toward the Lange SX100 boots. In fact, I have never felt a boot that fit my foot so perfectly until then. My recollection is that I did try on several others and there was one other that I remember fitting my foot shape, but it was quite a bit more money. As I was not intending to buy new boots at all, a huge jump in price was not in the budget.
So, I left with new boots that fit like a dream.
And my skiing has suffered greatly ever since.
Unfortunately, it took me quite a while to understand that the boots played a role in my regression. Prior to this, I was blissfully unaware that boots even had different angles or that a person might care about such things.
I recall having more difficulty than normal at the mountain the day after purchasing the new boots, and we left SLC the next morning. I didn't think much of it at the time, as we really don't ski mountains of that caliber most of the season. I could just be out of shape/practice. We usually ski at Terry Peak (most weekends) in South Dakota (not known for its mountains of course).
The rest of that season and into the next season, my father-in-law helped me with my form. I was a skier growing up, then I snowboarded for many years, and I somewhat recently got back into skiing most of the winter. It became very clear that I was skiing "in the backseat" way too much. The more I understood this, the more I could feel it myself.
We tried some spoilers. They helped, but they also created problems for my calves (which already create some problems for my circulation). We experimented with some shims under the ski boot. That helped even more.
When we went back to Salt Lake City a year after the SX100 purchase, I skied with spoilers and shims one day. Then, I went back to Sports Den to talk about the issue with the "experts."
I was basically (likely not in these words) told to "get better at skiing." The guy there said that the SX100 boots were on trend in a movement to get more upright. They were better for me. I should learn to ski them better. He put a small pad behind my calf to help me get slightly more forward. I guess it's about a 1/8" thick squishy pad that he stuck to the back of my boot liner (instead of the spoiler I had taped in before).
The next day I skied with my new micro spoiler and without any shims under my boot heel. It was probably the worst day of skiing I've had on the mountain. Yeah, it was still fun, but by the end of the day, I couldn't even ride down a easy groomer without huge muscle fatigue.
So, that was almost exactly a year ago, and I'm still confused.
I tried my liners in an old pair of boots. The old boots have more forward angle, but they're sloppy and way too soft. I like the stiffness of my SX100s. Yesterday, I tried my brother-in-laws boots as an experiment just to see if I liked the lean better. Not only was my toe in smashed agony (not enough toe box space), but I had my worst crash in a very long time. They just felt insanely foreign to me, and I actually think they pushed my feet into a duck footed stance (because of how they scrunched up my toes).
My next thought is to put a plate under my bindings (only under the heel portion), but I would rather find a solution that moves with my boot, so I can change skis easily.
SO, WHAT DO I DO? (P.S. Did I fail at keeping this message short?)