Adding last HW inv update field to existing report

I have a report that shows me all admin users on all of my machines, sql below.  Works great.

However, I need a way to see how outdated this info could be since user info is only updated when hardware inventory updates.

How can I run a report that shows me admin users on machines, but also show me the date this information was last updated (I'd guess last time HW inventory update ran)?

Bonus points if report could filter out the local Administrator user that exists on every machine and also group 'domain admins' which exists on every machine.  For now I just ignore those entries.

Thanks reporting gurus!

Edit: every time I try to add the sql code I can't save the post - going to try to add it as a txt attachment :(