Very interesting stitch pattern to play with: bands of garter stitch are worked using needles appropriate for the yarn, and then two rows of Stockinette stitch are worked using needles 4 to 5 sizes larger. How much size differences there is between the needles makes the lacey part more open or more subtle:
I consistently used a size 5 needle for the garter bands, but experimented with different needles for the inserts. The bottom three inserts are worked with a size 11 needle; the next three are worked with a 10.5; and the last three are worked with a 10. The largest size begins to look almost like a drop-stitch as the loops are so long. This has me thinking that I'll try it with a 5 and a 13 and see what happens. Many, many possibilities.