So not too long ago, i had to change one of my supra ecsta tires because a nail went through it... so i was left with 3 baldish ones and one brand new one. well now my front left is so bald that the metal thread is showing...so i have a problem should i buy 2 new Bridgestone Potenza RE750's and putting them in the front while keeping my kinda new tire and an old tire from the back and putting them in the back. then later when needed i buy new potenzas and rotate the front to back. Good idea?? need advice!