One of the R2 Builders, Chris Simonds, built a dozen or so sections of floor that match this. They were in the center of the room display at CV. His were all square though. I like the corner pieces. A few of us were discussing building wedges that, when put together would create a sort of stage to display the droids on at a convention or something. I think it died though as no one wants to have to carry an additional bulky item around to conventions!
I still want to do this for my den though.
That looks great, nice job!