Originally Posted by ColinB
I have trim to fit greens and blues in the several hundred adult rental boots in the rental shop i manage...not all rental shops are created equal.
That being said, a trim to fit will support your feet, a stock sock liner in a ski boot will not, the trim to fits provide the support needed for approximately 50% of the skiing populace, we have found that the superfeet kork custom works for about 85% of people....and that other 15% need serious corrective (medical) orthotics. The big difference between a trim to fit, and an unweighted custom is that a trim to fit betters your alignment, supports your feet and gets you close to subTalar neutral, a well made custom betters alignment, supports your feet specifically, and if made correctly puts you foot into true subTalar neutral, which makes for much better balance, less back and neck pain after a long day, and more responsive skiing.
The key in all of this is the technician, some folks swear by comformable, or instaprint, or superfeet, or archfitters....they can all be great with a good technician, though biomechanically a weight bearing footbed makes no sense from a support point of view.
Working in the "foot" industry underfoot support is key for everyday life in my eyes, too many people focus on putting 160 dollar inserts in a ski boot they wear on the weekends while they have no support in their work shoe that they wear 5 days a week 50 days a year, thats when you do damage to your arches and your alignment, do yourself a favor and get yourself a pair of trim to fits or dress fits for your work shoes as well.
just my .02