I did a little bit of catch up, here is the raised herringbone band stitch of the TAST challenge.
I was not impressed with my first trial, mainly because 6 strands of normal stranded cotton thread is not quite enough to give good coverage on my aida fabric. So the stitch looks somewhat ragged.
For my next trial, I did long stitches spanning all along the band, then covered them with the smaller stitches the original pattern calls for. As you can see, this creates better coverage and imho also makes the herringbone band sits better on the slightly raised stitches.
I did the same for the third and last sample of the stitch. I also wrapped the herringbone stitches differently for a chance. I quite like this variant.