The 2.5 was a new version we came up with that would be easier to use, and easier to machine. Some buyers did not like the height of the 1.3.
Also, the 2.5 is the fifth mod of the version 2, same with the 1.3.
The extra cost is for the anodizing; it takes a lot of prep and electricity to anodize all the parts.
The pics of the 1.3 (1.1?) posted are actually pretty old; good to see people still talking about it! Although it worked very well for the Savage and the Maxx's, it did not work very well at all for any other ones; which is why it was redesigned.
I am in the process of combining the best parts of both and just making a single design; there is no distinct preference and the more you can do with it the better!
Appreciate all the comments; even criticism helps when we modify designs. Nothing worse than redesigning something only to find out it is NOT an improvement!
As for the eBay one ... it looks like he tried to eliminate the ball and made it more complicated. Also the vise idea will work only on a very limited number of vehicles. Not sure if he tried to copy ours or not, but it does look somewhat similar. If so he would not be the first, Integy has an ugly knock off looking one that looks to be a more blatant copy.
Welcome to the site Sawtooth RC. Good to have you join up and provide insight into your stands.
The 1.1(?) stands I had were by far the best available to work on the Maxx and Savage. The clamping design is what sold me on them. If I still owned a Savage or Maxx, I would have never sold them.