Got done, I promise, but didn't get posted about... kiddos waaaaay underfoot. It happens.
Day 5: Shirts got sleeves attached and side seams sewn. Internal seams got finished.
Day 6: Cuffs, collars and hems. Invisible seams for the collars, and I think when I sew this pattern again (because I WILL, it was a blast to sew and looks amazing), I'll use invisible seams for the cuffs, too. These gave me a slightly difficult time, but that might be because they're small and fiddly.