Updated 10/24/2017
Chart 2A
Rows 7, 9, 23, and 27
Row 7: P, 2/2 LC2/2 RC, p. 

Buttonhole Chart
Row 1 (RS): Sl wyif, k7. (8 sts)
Row 2 (WS) Knit.
Rows 3-8: rep rows 1 & 2
Row 9: Sl wyif, k2, p2tog, yo, k3.
Row 10: rep row 2
Rows 11-32: rep rows 1 & 2
Row 33: rep row 9
Row 34: rep row 2
 

Update 03/09/2017
Chart 3 - Chevron (sizes 43.5, 47.5, 51.5) (worked flat over 26 sts)