I have a pair of S/Max's that have a very snug (borderline painful fit). I am wanting to get them fit with injected foam, but I'm not sure if and when I should custom mold the shells. What would you suggest? Heat Mold with the stock liner before getting foamed? Or get foamed and then heat mold? How much would you suggest padding in either scenario. I have tried on the S/Pros and they are too roomy out of the box. Previously, I've been in 98mm Salomons with foam and 6th toe punch, but no full shell molding.