SBRKites is your source for all things techy and kitey!  Having been materials sourcing with the help of some in the know friends I've been developing ultralight, ultrastrong powerkites utilizing dyneema composite fabric (formerly "Cuben fiber") and various custom cordages. Bridle drift over time is well known and frankly annoying, so my bridles are made from various braids of Vectran which is effectively a zero creep cord.  Your AOA today will be your AOA forever.  The same applies to flying lines of vectran which additionally give more feedback to the pilot.