Looking at x-max 120. Its a bit roomy over the forefoot, a bit tight over the instep, and a bit roomy where the leg shaft meets the foot. Just wondering how the custom shell conforms to the top of the foot. I know its not supposed to go in, but that said when you are tightening the buckles down does the softened shell pull in /down to conform to the upper profile of the foot. If not would putting a shim on top of the bootboard be a better option -assuming it will give enough over the instep. Any molding insights regarding padding, toe caps etc would be appreciated.