So I finally had time to take the ol' girl up to Discount Tire after finding a slow (but sporadic) leak in my left front. They dunked it and found a few slow leaks on the outside bead, then cleaned off a little corrosion on the wheel, re-mounted and balanced, and then made sure all tires were at my desired pressure. All of this at no cost! I was expecting to at least pay a nominal fee for their time, but was pleasantly surprised at their customer service. I will definitely be buying my next set of tires from these guys!