Am am a very skinny 6'1" and 125 pounds with size 10.5 shoes. My boots are solamon impact 8's at 27.5, and the foot fits very well. I was fit for them at the beginning of last year, but not by a real "bootfitter". I followed the guide on this site to do a shell fit and confirmed that the shell fits me well, and the boots feel good for the most part. The problem is in the calf. My chicken legs leave me with extra room in the cuff, so I have to crank down on the buckles pretty hard, which can be uncomfortable, and still doesn't feel very secure. With the buckles tightened moderately I have a whole inch of space behind the top of my calf if I lean forward. I was wondering what the options for taking up extra space in this area are? I was looking at giving it go myself before bringing it in to be done, but if I need to bring it in I will.
What could I try? I was thinking it would be better to add whatever I use as shims equally around the circumference of the cuff so I don't end up too far forward or back by adding material only on one side? It would be easier to just add it to the tongue, and most people with meatier legs have the added mass on the back of the leg, so I could see the boot as being designed to have your shin against the front, so that could be a problem. Should I take up space only in the back, the front, all around? Any other ideas for self-improvement here?
Lastly, when what I try fails, what will a real bootfitter do for this problem?