Just a follow on all of this....
I just created an updated installer for W7Pro64 using RT7Lite which allowed me to incorporate all of the updates as outlined above in my posting ^^^^^^^^^ up there. Since IE11 is not considered by RT7Lite as an update file I was able to save it in a folder to the ISO to allow installation afterwards. I am currently testing this very same installer via 'VirtualBox Manager" and so far, so good. I will give it a more thorough testing today when I head into the shop.
Cheerio!
Yet another follow up on all of this.
The custom installer I made works - just takes more time than a basic install (I use USB flash drives). Once the installer was done, I did the following:
Activate the O/S
Run Wsus Offline updates (takes a good amount of time, but saves using bandwidth)
Run Windows Updates (to catch most recent updates)
Install extra software titles (I use ninite.com and have a list of what we add to our builds)
Restore customer data (if there was a backup involved - I use Linux Mint and an external USB 2TB drive for doing backup and restore)
Install and run AOEMI One-Key Backup to create a fresh / updated restore partition.
As far as software is concerned, this is the way I currently do it.
When the unit first comes in, I generally remove the covers and take it to the back room and using an air compressor, blow out the insides of the cabinet and CPU heat sink(s). I will hold the fans from spinning up and blow the "yuck" out of those also. As far as the power supply fan is concerned, use a straw or something like that to hold it (fans) when you blow out the unit.
The software updates are still time-consuming, but at least you can get them started and walk away to do work on something else. I had 4 units in various stages yesterday which also allowed me time to put a small server / workstation together and do a full wipe of its 3 SAS drives.