I wanted four separate bands along the arms plus cuffs. Originally I envisaged having the black mesh as a single layer but with the difference in fabric weight I though it better to layer the mesh over the jersey sections I had cut out. The couple of centimetres lost by cutting and re-joining the sections was easily made up by cutting a slightly deeper cuff section.  

The thin neck band I replaced with a deep band about 14cm deep, leaving the right front arm seam open to about 2/3 of the way down to accommodate the zip I wanted to insert. I attached the neckband simply by cutting it slightly longer than needed then trimming to size once it was on.  

The hemline on the original pattern runs straight round but I quite fancied the idea of a stepped hem so I needed a facing for both front and back hems and these needed to go on before the side seams were sewn. I drafted a little sample to check the turning and how the top stitching and internal finish would turn out before extending the hemline at the back of the sweater to be 10cm lower than the front.