The Medium Adjustable Mighty Hoop Fixture works just like the normal adjustable fixture, but it is designed for the Medium Station.
This fixture will hold all Mighty Hoops up to a 13x16 size on the Medium Station, except the 4.375 Round, but It is most practical for Mighty Hoop sizes between 6.5 and 10x10. Any hoop wider than the 10x10 will hang over the edge of the station and would probably work better on the normal size Station. Smaller hoops will also work, but since it only holds them in the center and not on the left and right side of the station it is better to have normal dedicated arm fixtures for these. The dedicated fixtures can go on the left and right side as well as the center. See pictures for how the hoops fit on the Medium Station.