ok so i orderdered a set of 37x13.50 mud grapplers for my sub. they havent come yet though. anyways, i was wondering if i would need to do any fender trimming and how much would i need to do. the truck has a six inch lift. i read the tech article on fender trimming but i just wanted some advice. Also, what would be the best way to after trimming the fenders make it look factory or "neat"?