my DH does shift work, but not in blocks like you mentioned. He works a 24/7 roster and there is no consistency from one week to the next.. (the only consistency is a 6 week rotation)..

He has done block shifts in the past in his previous job.

If I can help, pm me, and I will give you my number.

ETA - I have a friend whose husband works a roster you have mentioned and I will ask her if she minds me giving you her number if you don't get enough response from here.