Not much experience with waterski hardshells, but lots with snow ski boots....firstly, i would recommend getting a proper orthotic footbed made - like the ones you would have in a snow ski boot...BUT it needs to be fitted by a podiatrist...thsi will ensure that your foot is held in 'subtalar neutral'. From here, you can then make proper adjustments to your hardshell as your foot is now held in a neutral position. Canting wedges are optimal as you can make tiny adjustments without compromising the boot amd release mechanism ...This is a huge and grossly miss-understood/ overlooked subject and in 99% of the time is the key to unlocking your true performance. I can give you some pointers and maybe a quick fix, but ideally you need a proper footbed...i use my snowski footbed in my strada boot....
