Check new ISMs before
Check your Core Module Power supplies. The ones with the old cp4 processors don't work with the new Pentium processors. You will need new ones. (biggest pitfall)
Note your current IP scheme in the switch. This does not always convert over.
FNF upgrade should take about 4 hours, mostly pulling cables out. I use spiral wrap with the fiber connections, especially if there are a lot of cables in your switch. Just added protection.
Hope all this helps.
John
Card Cage upgrade - my personal records
3.25 hours with another person
6 hours by myself.
Don't forget some good electrical tape to keep the filter grid in place, That is a pain.
Helpful tips.
Screw in your power harness, on the back of the card cage, BEFORE you tighten down the card cage to the module. Being able to slide the card cage forward really helps.
And again, good tape to secure the grid. If this moves when you are sliding in your card cage, it becomes a hassle.
Good luck.