(disclaimer, I'm not an engineer) I like the idea but there are a few areas I'm concerned about. On the video it is said there is 2000# on each chain. Are the clevis and chains shown strong enough for that much constant pressure, they seem small to me? Also, how do you know how far to tighten each chain. It's easy with the bars, once set up you always have the same number of links under load. Finally how does it work with heavier TW? I run around 1500#, with bars you get the size bar to match your TW, do these come in different sizes?