I am probably over analyzing this new professional series, but I think my foot is one that would require a heat molding of the shell and would benefit from the mimic pro liner. I also think
@Springer is in the same boat as me. If I interpret your reply above, it would be preferred to not heat mold the shell with the pro series, but use localized punching and stretching approaches.
I am thinking about future purchases, but on the Hawx Ultra XTD boot I am in, the toe box was long enough but too narrow. The fore foot area was a little wide, the ankle and heel about right. I heat molded the shell and the liner together to get more width in the toe box, rest of boot was good with no punches or other work required. It required toe caps and a second heat mold (upgraded to mimic liner on second heat mold) to get enough toe width. The heel and ankle are still good (shell didn't change significantly in those areas). I could use a little snugging up in the mid foot area, (although perfectly skiable as is and I am happy) which is where the foam of the pro liner would snugg the fit.
On my XTD, maybe just the toe box could have been "stretched" by a boot fitter?? (I am asking?) Then heat the pro liner, put it in the "cold shell" and inject foam to fill as necessary. Is that correct?
So if you do want/need to heat the shell to expand it in certain areas, should that be done
without heating the pro liner liner first, then after the shell is completely cooled, do the liner heating and foaming. Honestly, I am deep diving this because from experience I don't trust my local shop to think through all the steps and ramifications. As far as I know, they don't really do punching and stretching, but they do the memory fit process and the Fischer vacuum process on new boots. I could be wrong about the punching and stretching, since I have not needed it on my XTD's. Another shop fit my Club Sports which did need a punch only, no heat molding the shell, just the liner.