They are blind on the center wheels because it wouldn't turn on an 072 curve otherwise. I know from experience in changing out blind drivers on scale 6 axle locomotives.
It's a little disappointing to see all the hysterics on a model that hasn't even shipped yet. It is wonderful model and by far is the best diesel release I've seen to date. It is heavy, robust, and looks a looks like a real E8. No other model I've seen in plastic O has the true feel of an E8 quite like this one.
