maybe a silly question .....

if a sett is symmetrical, how do you determine where the repeat begins?


referencing Barb's book; page 22, Color Figure 27 MacLachlan Tartan.
Sett = 12"
Barb has the repeat marked. In this illustration, the 1st pair of vertical black stripes are marked as the beginning of the repeat. could the repeat start at the 2nd pair of narrow black vertical stripes? Of course it seems to me that if the repeat was shifted to the 2nd pair of verticals then the kilt would have a totally different look;i.e., a dark (black) rather than bright (red) sett.


ambrose