Very neat indeed and looks good.
I have a standard tonneau and don't use it much, for a couple of reasons, but mainly because when driven half open at any speed above 30mph it flaps about like a badly erected tent in a storm!
The second reason is that a lot of cold gets in on the drivers side. I'd wondered about getting a "semi-sidescreen", made, that is a side screen without the upper part, but your solution is better and probably cheaper.
