This peice is the sort of the centerpiece of the system. Using this peice you can remove any or all of the 4 gates around the edge and add ramps/stairs or walkways to connect other components.
If you want to add shields (mantlets), both the large 15MTW406 and small 15MTW407 mantlets will work, the smaller ones are recommended as the look better on this piece. Photos show the small 15MTW407 mantlets installed
