I've looked and used the search, but I'm asking anyway. I just installed a Mountune FMIC and didn't re-install the lower shroud, because I felt it would likely flop around down there, as there didn't seem to be a way to shore up the bottom section. I've also read that not using the shroud makes the air circulate around the radiator & FMIC, causing it to be less efficient. For those in the know, is there any truth to this? Should I be concerned?