You can also make the connection between two revs stronger by adding rare earth magnets to the end-caps (polarity matters though, HA!). Then when two pilots "lock-on" together, one can release the handles entirely and the other pilot assumes control of both kites, but using only one set of lines and handles.
Harold Ames came up with this little addition on a cooperative project for the 1999 Smithsonian Competition.
We were novice builders but won most innovative Masters award.
Our sails were printed in CMYK with a solar system scene on a huge ink-jet device.
Truly one of my most memorable occasions in kiting. Sony also filmed us for a high definition demo, although never got to see the final, we probably wound up on the cutting room's floor!