Well Barb, as usual you have done a masterful job. Thank you for this example.
I do have one suggestion though. The next time you come across a tartan like this you should do what I do.
Ball all the fabric up into a big wad. Then toss it all up into the air over your layout table.
Then get your pin cushion and pin where ever one fold of fabric falls onto another.
Much simpler and quicker than your method.
Or, a tried and true method is to simply take the bolt of fabric into the other room and lay it on Erin's table when she is not looking. Then you go and get a cup of coffee and when you come back, Voila, perfect kilt.