Casting on

I have also cast on and had to go back and do a gauge swatch. However one way to deal with the large increase from the edge to the body is to remember Elizabeth Zimmerman's percentage system. This would call for the edge stitch count to be 10% less than the body stitch count. For example on the 252 stitch body, or large size, her system would use 227 stitches for the edge. Just a alternate possibility.