I'm pretty crazy with it. I've got a set of a rough set of calipers that I will use to go from the back of the swing arm to the end of the square spacer. Trying to come up with something that I can also go off of the pivot point on the swingarm, but i think the calipers get it pretty damn close.
I'm pretty good with keeping it clean and adjusted, always have been. After the chain snapped and locked the rear tire up @ 60 mph on the TL, I tend to be pretty anal.
Stock chain, with about 10k on it. Cruising at 60 mph.