I held my yarn double to get to the proper weight required for this knit.

I added 2 repeats to the body before splitting for the armpits.
I lengthened my arm depth to 8.25 because I have found in the past this is more comfortable.

I added 1 addition repeat in pattern, on the back panel before the finishing rows, to create a bit of German short rows.

I added an extra button hole above the arm split because I had 4 buttons to use up, and like even amounts.