I like the cleverness of this pattern, ending with so few ends to sew in (only 2, if I hadn’t gone and done brown trim).

My gauge was 19 st per 4 in, instead of 17. That works out to 12% difference. I redid the math as follows:

CO 42.
Increase as written (numbers: 51 to 57, 65 to 73, 79 to 89, 93 to 105, 107 to 121, 127 to 142, 135 to 151, and 143 to 160).

For sleeve separation: 25 for front, 25 for sleeve, 42 for back, 25 for sleeve, and 25 to front (142 total instead of 127).