I recently bought a pair of Tecnica Mach 1s in 28.5 and am having some issues.My previousts boots were Tecnica Ten.2 100s in a 27.5 A heel lift was added to those boots to give my toes more room. Although the Ten.2s were comfortable, I found them to be too flexible and found that I was pushed forward over my skis more than I would like (it just occurred to me that this was no doubt because of the heel lift). I went to Inner Bootworks at Stowe to check out a stiffer boot and was recommended a couple of models in 28.5 (my previous boots were also from Inner Bootworks). I ended up at another ski shop and, on a whim tried on some Mach 1s. I loved the way they fit in 28.5 and found the 27.5s felt too small (I should note two things: the boots still had the included shims mounted and I was wearing medium weight socks which, I'm embarrassed to admit were not ski socks). When I got the Mach 1s on the mountain I found that, after a couple of runs, my right foot was going numb and I was feeling some pressure around my heel and around the second buckle up from the toe (I was wearing the same socks as when I'd initially tried the boot on). After this unpleasant experience I went to Inner Bootworks where they removed the shim and updated my custom footbeds (they also removed the spoilers from the backs of the liners). I also bought some Smartwool PhD Ultra Light socks. With the new socks on and the shims removed my feet felt less enveloped but still held firmly in place (with more room around the ball of my foot).
My first time skiing the boots after the adjustments were made I experienced no cutting off of circulation but wondered if my feet weren't being held as firmly as they could be. It seemed as if the socks were not gripping the boot as I am used to but I don't know - maybe this is normal for so thin a sock. The next time out (today) I tightened my boots up for a snugger feel and, while responsiveness was better, my circulation (again, more on the right foot but ever so slightly on the left as well - I think) started to get cut off. I also felt some aching underneath my feet, specifically under my heels and around the second buckle up from the toe. I should mention that my two lower buckles were not very tight.
When I was having the boots adjusted (having the shims removed) one of the staff members suggested that the shell size was too big. A senior staff member came over to take a look and said it was fine. Still, I'm now bothered that I may have a boot that is too big for me. At the same time, my circulation is getting cut off and my feet are aching. I plan on going back to Inner Bootworks and getting their opinion but, in the meantime, does anyone have any thoughts on this? I leave for a ski trip in two weeks and need to get this sorted out as soon as possible. Thanks in advance.