Hey Thanks. I remember hearing that about different ski boots, how at least two sizes will often share the same shell size. To be sure the main upper part of the boot has 27/28.5 stamped in the plastic, but the main white lower part says only 28.5. So if anyone is thinking about this I'm looking for a boot with a lower part that is marked with a number lower than 28.5, sole length less than 307.
Also, good call on the liner, my fix at this point has been to jam an intuition protour in there, which worked fine over the past weekend, but I'm worried about the long term. The dynafit liner worked well for a while, too, until it didn't, the shell is simply a smidge too big. If the right person is out there, a trade would just be ideal.