Some fit info:
"Fine movement control is most accurately accomplished at the ends of our extremities. Toward our core, movements are progressively larger and more powerful, but certainly less subtle as larger and larger muscles become involved. Specifically it means that fine balance is best accomplished with foot movement. This movement, when standing, moves the ankle inward and outward, often into direct contact with the shell, which immediately blocks foot motion and inhibits balance. In this case everything rolls uphill until we use large, difficult–to-control hip movements to edge skis. Fortunately the solution is easy. When they are barefoot in shells only, I find many skiers’ inner ankle bone (medial malleolus) is against the shell, even when standing balanced and perfectly erect. Sometimes liners can reduce the associated pain, but they do nothing to restore lost foot motion. Punching the shell in the ankle and maybe the navicular (bone below and in front of the
inner ankle) area can restore the missing motion that is very helpful for a smooth transition between turns."http://www.lous.ca/Articles/LOUS%20S...20PICTURES.pdf
My Nordica Doberman 130s fit just right, no slop and adequate room inside for the foot movement described above, and often I find a foot buckle flapping loose. I use Booster Straps cinched tight on the boots and don't have the cuff buckles as tight as they could be. The lower cuff buckle does a bit to regulate flex, and I loosen mine one notch for bumps or powder, and tighten that last notch for packed run skiing.