Two other items regarding chains:
1. To use bungees, cords, springs, etc... across sidewall/rim to take up slack or not?
I don't use these. But thinking about this, don't they really just pull all the slack to one side of the tire, to the limits of how tight you fastened the chain on the inner/tractor side of the tire? I don't know, maybe they stop the chain from banging on the fender at road speeds?
2. Do you use any safety clips, wires, etc... to lock the chain fasteners? Ever have a chain fall off because the fastener went slack (no tension) or it got bumped, etc..?
I always thought the purpose of these connectors is to get some leverage when making the final front side connection or have a more secure way of connecting/locking the chain, but with my bigger tractor chains the leverage I gain is little compared to the weight of the chain or it's ability to slide on the treadbars. And if locking is their purpose, why doesn't the S-hook on the back side come unhooked more often when the tire pulls and tug (slackens and tensions the chain) in real world operation?