Hey Phil, Glad you are done with those night shifts for awhile. I am very familiar with 12 hour shifts and relief guys calling in sick. I have even worked a few doubles in my day. I was a power plant operator and shift supervisor for thirty years until I retired in 1997. Man - I always hated those 12 hour night shifts - trying to stay awake after 3 am was almost impossible for me, especially if there was not too much going on and the plant was running smooth.
My wife and I are going to be gone fishing over to Lake Champlain for the next 6 days, and I wont be on line till we get back next Saturday.
Good luck on the fishing Phil and take care.