This morning I had intended to have the assembly complete of the RedBot. It's 1:30, I've been here over two hours, but I'm not making progress except in terms of understanding the changes to the RedBot kits and their Assembly Instructions online. I think I know now why they didn't send me the paper instruction booklet. It was for an earlier version that included the Sensor Wheel Encoder. That's the wheel encoder I have (purchased separately), but not the one that links with the kit that I have. The one that links to my kit has something called the Dagu Wheel Encoder kit (purchased separately) which I don't have. So I spent the morning determining this by composing an email complete with screen shots to the good people at SparkFun. In the course of composing it, I think I arrived at the truth of the matter. I think I can carry on even without a reply from them. I don't think I need to order any more parts before I can build. I'm just going to go with what I believe is the truth at this point.
Here's the confusion screen shot: