I'm obviously not a kiltmaker and won't pretend to have any solid answers for you, but based on the sett size I'm seeing in the photo of Mr. MacPherson there, I wouldn't think it would be an issue. From top to bottom of his kilt, I see about 3-1/2 sett repeats. That's about the same as my Colquhoun Reproduction tartan (also by DC Dalgliesh). So I'd say his sett size is about the same as mine, which was absolutely no problem for Barb T. when she built the kilt.

Just to be clear, are you wanting the sett size about the same as his, or even larger? Are you wanting it pleated to the stripe, sett, or what?