Binding QML widgets to a list model, but having some widget only bind to a specific index?

Question

I'm writing a QML GUI that talks to a monitoring server. In one case, there's 3 grouped remote systems, one is is a master, the other two are slaves. I have the full statuses of each one, but need to show more details for the master system.

So for example I'm receiving an update message containing:

{
    systems: {
        1: {
            type: Debian,
            name: system1,
            status: OK,
            detailedStatus1: 123,
            detailedStatus2: xyz
        },
        2: {
            type: Ubuntu,
            name: system2,
            status: OK,
            detailedStatus1: 456,
            detailedStatus2: abc
        },
        3: {
            type: Windows,
            name: system3,
            status: OK,
            detailedStatus1: 789,
            detailedStatus2: def
        }
    },
    currentMaster: (1 or 2 or 3)
}

...and I want to show type, name, and status for all 3 systems, but only show detailedStatus1 and detailedStatus2 for the currentMaster system.

What should my QML model be like? Should I have a "masterModel ListModel" that my detailedStatus widgets bind to, and an "allsystems ListModel" for type/name/status, and update masterModel everytime currentMaster changes? Or is there a way to do this from a single "allsystems ListModel" , using currentMaster to know what to bind to? Should I be doing something else altogether?