HI.
I'm kitesuping and kitesupfoiling since a few years with very very short lines. I use kite 10/12m2 with 3/5m lines, to ride from 8 to 20knts, a small foilkite of 4,5m2 with NO lines to ride from 12 to 25 knts, and a Pansh Aurora 16m2 with no lines too. That's realy fun !!