Thanks for the info. That looks a bit sturdier than the t-track, but its a bit more money as well. I've already ordered the t-track, so we'll see how it holds up. If it doesn't work, I can always rout a bigger slot for that stuff.
Its funny that this came up. I've just started construction on my bench, and had the thought to use a track system. I was thinking, "I wonder if anyone else has track mounts on their reloading bench," and then I found your post.