Are their significant differences between Burton Life Liners, Intuition Liners and others like Nitro Cloud 10? A fitter told me that Burtons don't really fill voids or mold as much as Intuition. I've gathered from the main heat fitting thread that it's best to use a boot convection oven, but Burton recommends "This can be done at any Authorized Burton Dealer who has a Therm-ic heat molding unit." Would that do the job as well as a proper oven? What temp and time for Burton Life Liners? Thanks!