BigDave
Your chains on the rear tires don't look like they are on correctly. Evidence is that about 10 - 11 o'clock, there are two cross links that are practically on top of each other, yet the spacing on the side chain looks like it is the same as the others (every other one). I think if you move those cross links around so they are evenly spaced on the tire, you will find that the space between the connectors is filled in rather than in need of more cross links. If that is the way you want them, fine by me. But I think you will find that, with use, they will want to move around on the tire and will become very loose even tho the spring tighteners will work hard to keep them tight. My guess is that the side chains are plenty long and you will need to take off some of that length.
Before putting on the tighteners, I would jack up the tire and spin it several times or run it up and down the road to get the cross links to settle in, which should give you a chance to take some links up at the side chain connection. I'd like to see your chains look almost as good as the model posing with them.