Update. I have had several days on these boots and the last 2 have been using an increased arch/inside support under the footbed right up against the inside wall of the boot and extending from heel to just forward of the arch (maybe not quite forward enough - Under ball of foot feels as though it's losing contact) This done by the same bootfitter. It has had interesting results, as follows.
The first day was at Mt Hutt so chairlifts all day. I skied all day in whiteout and semi clear varying conditions. Snow was shallow heavy powder and the undersurface quite variable. By unbuckling on the chair sometimes I managed to keep the boots on as they were. Boots held my feet very well, giving lots of confidence and more precision than I have been used to. A good day of about 28000 vertical feet and did not notice pain or excessive tiredness in the feet. No edging or crossing problems noticed due to change in footbed angle (invert/evert?)
The second day after 1 day back at work was up to Broken River. There is quite a bit of walking and steps even with the "inclinator" in service, and it was warm, so I was getting hot feet even before the first turn. Boots had been OK in walk mode but were killing me as soon as we started skiing, and I needed to take out the blue liner under the footbed. From this point I could cope but my feet were not at all happy. We still had a great day though and skied out through Allans basin right down (almost) to the carpark.
I was surprised at the difference in foot happiness. But of course they don't get a rest with rope tows.
Buckles - toe and instep - not tightened at all. Bottom ankle buckle - still done up moderate.No upper ankle but huge power strap
Any comments or observations welcome but my main concern - is there a way I can determine if the arch support is being overdone? I feel like I may now have minor bruising under the arch (the bit nearest the heel).
Note: Rear spoilers are both out to save the left leg from my old friend the lower calf pain.
On the plus side I have greater awareness of my edges and feel pretty sure that these boots have helped considerably.