Upgrading powerconnect 6224 connecting to PS6000

This weekend we have planned a light-out maintenance because the stack master (a stack of two)needs to be replaced and the secondairy needs a firmware upgrade and boot loader upgrade (comming from 2.2.03 going to 3.3.3.3)..The new stack memeber is allready upgraded to 3.3.3.3

This stack is connected to another stack of 6224 witch also connects to a group of PS6000. This stack is allready running 3.3.3.3. so no worries there.

Just to be sure i have a couple of questions: Since i have to remove the master and then the remaining switch needs an upgrade there is going to be a complete outage. So i am going to put al vmware host in maintenance en shutdown al physical servers with iscsi connections. And i am planning on shutting down the trunk to the other stack of powerconnects. I am wondering if it is better to shutdown the SAN (4 memebers in a group) wich connects to the remaining member that needs the upgrade?

In short my steps:

Vmware in maintenance
Shutdown physical servers with host targets to iscsi
pause replication between san groups
Upload image to switch stack
Remove/shuut down trunk to other switch stack
??shutdown san??
Remove stackmaster (causing the memeber to reboot to new master role, due to old firmware this reboot needs to take place)
Upgrade firmware and boot loader on the remaining switch
Replace stack module and 10Gb module from the former master to the new member
Connect the new member and fire up this new member
Keeping fingers crossed that the stack has formed....

Care to collaborate on this..?