im pretty sure that every FT shell is the same size wise, except for the new wider ones which are the hotdogger and booter. i don't understand why you dont just get the konflict. its the exact same boot w/ a stiffter tongue, so just get a differnt tongue. o and there's plastic buckles on the HD and booter to save some weight (like what 4 ounces?)
look through the catalogue and read it. there are very small differences between all of them. FT are fully customizable, they sell almost every part to the boot