It's hard to see in this pic, but there's two rows of purl about 3/4 inch above the bottom ribbings. That's where I started to wander.
I didn't want to use rib on the front closing. So, I hung the edge, and used quaker stitch, giving my garter bar a little exercise. It turned out nice and neat, and the buttonholes are hidden in the knit ditch between the two purl bands. In the above pic, I am stretching them open with pins to show you where they are hiding, The ending purl band curls under, so finish is neat.
Then, I repeated the quaker stitch for the cuff of the booties.
Here's a pic of the 5 garment pieces just off the machine. The back argyled nicely. Didn't expect that!
I used a sock weight hand-painted 100% merino yarn from Pollywogs. It took two skeins (each was 50 gm, 218 yds). I used the Singer 560, with the ribber. The ribs were done at tension 4/4 and the rest was done at tension 6.2.
Notice that I used sock yarn, and made socks. Must. Break. Out. of this. Rut.