Something to think about is that some lines can vary from Brand to Brand.
Seems strange but they do, they must measure there lengths slightly differently.
ta Vando
The jury has returned - just got back from my first sail on 26" lines, and yes I should have ditched the 22" ones a long time ago. I noticed one benefit not mentioned so far - I have always had trouble "popping" off a wave, so have never attained any height in jumps. Today, even though I felt very rusty from lack of sailing, the first small jump I tried resulted in more air than ever before. 22" lines just wasn't giving me any room to spring the board off a wave. I also nearly decapitated a penguin, but that's got nothing to do with harness lines, just an indication of how friggin' cold it was!
WOW!!! This is really interesting... I sail 18"s and a waist harness. I had no idea so many people went so long! A mate lent me his rig last summer for a blast out of St. Kilda and it nearly killed me because the lines were SOOOOO long (seat harness as well)- I was having to use a massive amount of strength to keep me where I wanted to be (i.e. back straight, arse not in the water). The 18"s I can sail all day without effort, because I don't have to use any strength at all.
All my friends in Egypt (very, very good freestylers) use the same length lines. Strange. Actually, I might have worked it out - I sail with almost no weight on my back foot at all due to the puny chewed-up chopped-down little freestyle fin I use, so hence I'm naturally wanting to be a lot closer to the rig, where as a lot of guys (esp. the speed sailors) look like they're weight-back / closing-the-slot style sailing.
Maybe that's it...
Might be interesting to actually measure your lines - the so called 22-28 Gaastra adjustable lines at full length were actually over 31. When I shortened them to the mark I thought was about at 24 they were actually at about 27.
Problem is I think they slowly slip and lengthen the longer you sail
Can understand now why I shorten them when it was windy as.
Might go back to the old non adjust 28's