I started through Jim.  However, when he heard I wanted the whole setup he told me I may as well deal direct with Tuff.  I did that, but I believe Jim got a commission out of the deal.

My system is not portable.  Personally, I wouldn't buy Tuff's portable unit because IMHO it has one big flaw:  Look at how the alley comes off the tub.  There's a funny corner they have to make when they leave the tub, and that is not a natural flow at all.  We had our unit set up like that at first, but we learned quickly that it did not work well, so we gave the tub a quarter turn.  Now the cattle come in, make a 180 and are pointed straight down the alley.  It works much, much better.  However, from what I remember of the portable unit, you can't change that configuration.