The recently passed Dennis (Dorsal) Fishback stacked 5 Spirits.
There were a total of 8 lines in-between each kite. You can probably
estimate the length of the lines used in the photos by comparing them
to the wingspan of the kite.
This is the final in a series of 5 photos taken in 2004:
Here, Dennis even carries the Spirit case like a Dorsal fin (I miss him):