How do you make the Filter so we can use the FIM cmdlets to list Users who have no Manager attribute

I can easily create a Set of Users who are "unusual"

The SET criteria is

EmployeeID starts with %

and Any of

    EmployeeStatus not starts with %

    EmployeeType not starts with %

    Manager not in All FIM users

This criteria works and gives me all the users when I push the View Members button.

But when I look at the Set's Filter it seems to refer to a uuid of that All FIM users Set. To be honest I dont fully understand the set's XPATH filter.

What I hope to do is to some how build a filter so that the FIM cmdlets can be used to identify and fix up these users, especially those who do not have a valid Manager. There are hundreds of these non-standard users and although possible, its not practical to do this by hand via the "All Non Standard Users" set.

Any hints welcomed.