I had mine out yesterday. It wasn't an exact measurement as lines were still on the bar, but I checked as best I could and they all seemed to be the
same length.
2" of stretch on your lines sounds like a lot!
Rev 1.5 SLE
PL Pepper 1.5m, Twister III 3m
Flysurfer Peak I 6m, Peak II 12m
Ozone Access V6 6m, 4m incoming!
Arcs Venom 13m, Synergy 15m
LEIs Slingshot Rally 7m, 9, 12m
Kheo Flyer Landboard
PTW SuperBug II
Nobile NHP Carbon Split