Update 2. The other side went a little better. The lower nut is really the challenge. It took a bit, but I was able to cut it, turn it, and hit with a chisel. (Broke my thin screwdriver in the process).
The 3 year old end links were surprisingly loose. Good news is that I finally was able to use the honda links that I bought a few years back.
For the price, there is no beating the 3in Harbor freight cutter. It's easier to use than a grinder.