== Design decisions explained ==
There are lots of Arduino Shields out there. When I started to think about implementing this idea I thought being compatible to old shields would be great, since the “Skyline Shield Design” is almost certainly going to stay niche product.
The original Arduino Shield design has this off by 0,05 inch flaw, also I think it is just too big. I prefer the Arduino Nano or the Arduino Micro design.
With these small boards (Nano, Micro, Mini etc.) it is usual to put shields below the controller board.
At some point and lots of changes in the PIN design I realized that when I put my shields on top of the controller board I could easily achieve compatibility to all the other shields.