I've been seeing folks talk about dental expanders being used in their gauntlets finished design. Now that I finally ordered a set of mack daddy ROTJ gauntlets, I figure I best figure out where the heck they are placed on the gauntlets.I just can't see them anywhere on anyone's finished products...Is it placed inside of them or kind of half hidden and half seen, both inside and out??? And finally, are they a necessity to finish your gauntlets correctly? I'm at a loss at this point. Thanks for your help guys!