Did that, bought a pair of lines marked with a " 50# 18' " label (50 pounds? 18 foot I suppose - well thin lines that are about 6m anyhow) for zero winds. So I guess what remains is to work on the technique. Thanks for the hint anyhow.
I find that totally zero wind flying is very exhausting with my 4D (actually the only kite I got to do this with). Making several starts and landings is one recommendation I follow. I've also found that I need to work less with the kite at about 45 to 65 deg from the ground than with the lines close to horisontal. I really must work on my zero wind flying.
Glad to have helped him in choices. For the money - I feel it's a very good kite. Impressed me!
Also plan to be at WSIKF all week - look me up - I'm in the blue hat with goggles on! Be glad to help with whatever he needs help on!
The 4d will definitely train you to temper your inputs. I fly mine on 30' lines, it will fly in absolute zero wind, and it flies almost as fast as a Micron in any wind over 5mph. I'm in... My son has taken possession of my red 4d, it might be fun to try to fly pairs with him.