I just tried one saturday at the mexican FTRBKOTA it was a 17m Lift
The 17m is a 2003 kite.
2004 and 2005 GK sizes are 7, 9, 12, 15, 18 and 20. I have sailed Lift 2004 15m and Curl 2004 18m.
Tomorrow with a little luck I will prove my new GK LIFT 15m 2005. I will explain as it works.