Start to finish, assembling this box took about 4 hours. I did not paint the port and plan to apply wood sealer (Bondi?) in the future.
If I used the belt sander, I could shave off (see what I did there?) a half hour or so. If I tried hard, including cutting, I bet I could do this in under 3 hours for one box and under 5 for two.
I’m including some old images of different boxes. All photos are in reverse chronological order.