The left hand pack is threaded in the Z direction, the right hand pack is threaded S. If you weave them together they form a chevron. If you weave them seperately they form two different twisted bands.
So, here I wove them together for a but, then seperated them and wove each pack seperately for 40 picks. I then allowed them to follow their natural twist and added a little extra in, by turning the band over in their desired direction, cards and all by 360 degrees.
Then weave them together again for a bit.
And you get this interesting effect. Which is interesting