I put the Lares 10:1 box in my car a few years ago, and really like it. I did do the matching Lares rag joint, but sorry to say it didn't hold up too well. This winter I pulled my column to go through and clean & replace the shaft bearing, and found the rubber on the rag joint was in pretty rough shape.
I suspected this was a problem as last summer the steering had more play than previous years. I'm sure the slop in my wheel was a combination of an old shaft bearing and the rag joint.
After pulling the Lares coupler off, I was surprised to see how soft and pliable the rubber was. It is infused with a fine wire mesh, but I think it's probably too fine to really make the disc as stiff as it should be. It gives in almost any direction I want to twist it, and the wire mesh was emerging from the disc pretty much all over. It wasn't falling apart, but I was disappointed in how the disc lacked any stiffness. It just didn't seem that durable after 2-3 years of driving.
I didn't take pictures, unfortunately, but ended up rebuilding the rag joint using a polyurethane disc from NPD. feels much firmer and responsive. If I were you, I would do the 10:1 ratio box, but seriously consider looking for a different option for the steering coupler.
