I have no plans to use the chains as traction aids to pull down buildings. They are only for traction on ice and hard pack snow so seems like less drive train strain than running the fel moving dirt.Looks great!
I have heard concerns about chains on the front of a tractor stressing the front drive train...do post pictures of your tractor when you get the chains on.
I know it was not a tractor, but I remember the manual for my old CJ5 jeep stating that if chains are used, it was recommended to put them on the FRONT wheels.I have used chains on the front wheels for snowblowing with my B2650 for 4 years. The point is that one often has enough traction to move forward but lose steering. I can't speak to wear of front axle components but it is more important to me to be able to steer when one side of my driveway has a dropoff. Chains and 4wd help but are not a complete cure. They do allow you to back up and correct course better, however.
So it depends on your priorities. Safety or tractor preservation?