Heyo, Now that I'm advancing more in rear wheel moves, I definately need more stopping power. I thought about grinding, but I'm too lazy and afraid of messing up my pads. So I want to start using tar. I've heard roofing tar, which sounds like a bitch to get, but I've also heard of road tar from argade. So what is the best way to get/apply tar? Anything else important I should know? PS I'm running avid sd 7's.