The BSP is a supporting cantilever which allows to install a trainingboard into the Base A wall brackets.
If plugged, the measurement between front side of Strong Ant 3 or Ant Hill 63 and the wall behind is round about 32 centimetre, which allows a full scale training, even when an installation above a doorstock isn´t possible.
The pre drilled holes inside the plate are provided for installation of SA3 or AH63 and even SA2 (but with restrictions). Nevertheless it is up to the customer to set it´s own pattern to the plate. The distance between the beams is identicall with them from the Parallettes. Once the Base A is installed it is easy to switch between Parallettes and the cantilever
BSP is made from non coated birch plywood, which is the reason why it is declarified only for indoor usage.