How uniformly lines alter their lenghts is complex matter, at least in FS's there is quite a lot variability. I don't know why Ozones would be any better in that respect. Adding pigtails corrects line shrink in the middle of the wing, but because shorter and less loaded bridles closer to wingtips have not that much error they are overcorrected. Also chord of the wing is shorter there, this makes overcorrection even bigger.
As we know it is wingtips that often cause problems when kite goes out of tune.
"Spanwise shrinkage", effecting curvature of the wing (canopy curve), is not essential at all. Essential is that in spanwise bridle lenghts, bridle loading and chord lenght are variable. This means chordwise errors are variable and so should be corrections as well.
It is true stretching every bridle line is quite a work and results are not permanent. But I don't know if strecthed bridle is any worse than like it was originally, it may be even better. To replace the bridle is even bigger work and it costs.
gmb13 wrote:I did include Z (Brakes). Basically you lengthen by the same amount you lengthened Cs.
Like I wrote, this is too little if compared to original. But if tighter brakes is ok then why not. About twice the C correction would keep brakes the same they were before, depending the location of C line row in particular kite.
Problem when doing these kind of approximate fixes is that kite becomes gradually worse. If you are a pro and get new kites regularly it is not as harmful than for normal user who wants (or have to) to keep his expensive kites for years. But for sure that kind of quick fix usually helps and is easily done.