Ways to make Atomix Magna Hawx 130 as soft as possible?

I think I may have made a grave error in getting new boots and liners. Some backstory:

- I have extremely wide and flat feet; my last is basically 120mm and my toe box is very boxy
- Many boot fitters have commented that I have the widest feet they've ever seen
- Because my feet are *so* difficult to fit, I simply go with whichever model the boot fitter says can be made to work with my feet; I've never bothered shopping around for boots or learning about them as a result.
- I always thought that stiffer = better, because greater stiffness equals more "performance." This is probably totally wrong.
- I'm short at 5'5", and I read that taller people should go with a stiffer boot because they have more leverage on the boot. I'm short, so I probably shouldn't go so stiff... but I did. Because I didn't know.

A year ago I was in Niseko and badly needed new boots because my old boots were drilling into the tendon that runs along the top of your ankle. The shop gave me the Hawx Magna 130 (instead of a 100 or 110) because I figured that stiffer was always better. This year I replaced the liners with ZipFit ones because my toes are boxy and the toebox area is made with thin material. Unfortunately the ZipFits are made from cork and *very* stiff. A different boot fitter said my boot and liners were the stiffest they had ever seen, far more than the 130 rating on the boot itself..

I've since learned that overly stiff boots can send you into the backseat very easily, and indeed this is what I'm feeling in my thighs this year. It probably doesn't help that I'm also skiing a stiffer ski this year as well.

So... I don't know what to do. It appears that due to my erroneous understanding of "more stiffness always equals better," I may have dumped money on and subsequently customized a boot and liner that are way too stiff for anything but charging on groomers.

Things I've done:

- removed the velcro cuff tightener on the ZipFit liners
- removed the lacing system on the ZipFit liners, so now the tongue can bend freely forward and back
- removed one of the two screws on the back of the Hawx boot

For the future:
- can I remove *both* screws on the back of the Hawx?
- I want to adjust the ankle angle of the boot to be more forward

Anything else I can do short of buying and customizing a new boot?