Hi Guy
I have taken your advice and I am using 26" for speed and slalom but still use 24" for freestyle,waves and bump and jump. With the 26's I can now hold big sails

in greater wind strengths(4.2m in 25 knots)
I am now 135cm and weigh 31kg and always use a waist harness but will try and use my old seat harness next time I go to Sandy Point.
Merry Christmas to you and your family.