If my cardboard foot is accurate (holy smokes I have wide feet!), the heel should be about right. I did add six gusset stitches, I just couldn’t help myself. I put them on the instep though, so as to not interrupt the Fish Lips heel instructions.
I was having a terrible time with the tension on the heel when it came time to knit back and forth in stockinette for the short rows – my gauge purling is much looser than knitting – but a fellow knitter suggested I try knitting backwards instead. My tension isn’t perfect but it’s much better than the purling was, and it’s kind of neat to be able to knit back and forth without turning the project.