My technique is even uglier. I go along the outside edge, across the border, then right back down the same stitch line then up the edge to the next key. I always use 60 or 70 wt thread for these. I HATE stitching them, but if you have a slightly full border, it's the easiest way to get it under control. I also like the way they look on an unpieced border, like you are doing, with uneven key widths. Like a 3", then two one inch ones, then another 3". Have to plan this so they come out even.