I've had the Women of NASA kit for a while, and my kids kept finding ways to knock over and break the dioramas. Didn't seem appropriate for these pioneering explorers and scientists!
Thus, this mount! It's sized to put the shuttle astronauts in the middle, the other two positions are interchangeable. The pockets in the back are sized for #4 round head screws.
The author marked this model as their own original creation.