Thanks for that picture! Was already wondering how well GMK Paperwork works with the BM43a. I also already noticed that GMK Paperwork has no 2u Shift, but mostly because I recently toyed around with KLE and then checked my design for GMK Paperwork compatibility. In the end I replaced the 2u right Shift with 2x 1u keys to achieve compatibilty.
BTW, what case color is this BM43a? The front looks more like orange, the back more like pink.