My Z Top fits like a dream. This is Crane Hill by Miriam L. Felton and can be had free over on this page.
I made one major change. The back is worked without the V shaping. It is just decreased (per the pattern) on the arm edges and then worked straight up. Because the neck edge wanted to curl - the natural tendency of stockinette - there is a row of crab stitch across to control the fabric.
the yarn pooled might not be for everyone. But it is so "me" that even my family said the magic word. COOL.
My Z Top is Cool.
Ain't that grand?!