what is best tow equipment?

There were 4 failures all within a short time period. I remember 2 were as a result of design - meaning poor choice of what to bolt to. One was a failure of the base plate its self. 4th one, I do not recall specifics. It was a direct response to those threads, that I bought more chain, and wrapped it around my frame. The whole concept of "safety" in the term "safety chains" is redundancy, which results in real safety. The idea is to protect if something unpredictable goes wrong. The reality is, that while your base plate sounds like it is bolted securely, you can not predict metal fatigue or the consistency of the metal that is used. Much of the steel used in this country is produced in China. Who knows where any of these baseplate manufacturers buy their steel, but it is very likely they would get it from China, as it is the cheapest place to buy steel. One of the things the company I work for has discovered is that it is very difficult to get consistency from from the metal produced their. Some locations in China are better than others, but it takes a lot of testing to discover who is making quality steel. It took us a couple of years to find a good consistent supplier. As far as baseplates, it is documented that one supplier has had issues with metal fatigue do to the quality of raw material, which would suggest redundancy is necessary.