I took this picture so that you could see how I covered up my fuck-up with the lace part pulling way in compared to the half-double-crochet part. I didn't have enough yarn to do a frilly border, but what I did was to go around once with a single crochet, but when I hit the lace, I did a triple crochet, which built out that part. Then I did a simple triple-crochet/chain-one border on top of that. The sides are not quite square (though I may be able to pull them squarer when blocking) but the gap isn't glaringly obvious.
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