After creating Aux sends, how to set volume to 0 db?

Hello o Michael,
Great to know it's working,
Here's a version you can choose from a set of volumes to set or choose a custom volume.
You can add delete from the set here:

let volume = chooseAnOption(["6", "3", "0", "-3", "-6", "-12", "-20", "-∞", "Custom", "Cancel"])

Choose your options here:

////////      CHOOSE YOUR OPTIONS      //////////////////
const sendNumber = 7
const sendPath = ["bus", "bus menu 1-128", "Fatso (Stereo)"]

Here's the script:

/**
* @param {number} sendNumber
* @param {string} volume
*/
function setVolume(sendNumber, volume) {

    sf.ui.proTools.appActivateMainWindow()

    // If send is closed, open.
    if (sf.ui.proTools.selectedTrack.sendSelectorButtons[sendNumber - 1].value.invalidate().value === "") {
        sf.ui.proTools.selectedTrack.trackSendToggleShow({
            sendNumber: sendNumber,
        });
    }

    let value
    volume === "-∞" ? value = "-150" : value = volume

    const sendWinVolume = sf.ui.proTools.floatingWindows[0].textFields.whoseTitle.is('Volume Numerical').first.elementWaitFor().element

    sendWinVolume.elementClick();
    sf.keyboard.type({ text: value });
    sf.keyboard.press({ keys: 'enter' });

}


/**
* @param {array} item
*/
function chooseAnOption(item) {
    let promptWin = sf.interaction.popupSearch({
        items: item.map(x => ({ name: x }))
    }).item.name
    return promptWin
}

function getCustomValue() {
    let value = ""
    value = prompt("Type a value between +12 and -150")

    // if you cancel the prompt, stop the script
    if (value == undefined) throw 0
    // if value not a number call function again
    if (isNaN(+value.replace(/[,]/g, '.').trim())) return getCustomValue()

    // else return volume as string
    return value.replace(/[,]/g, '.').trim()
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////

sf.ui.proTools.appActivateMainWindow()
sf.ui.proTools.invalidate()

////////      CHOOSE YOUR OPTIONS      //////////////////
const sendNumber = 6
const sendPath = ["bus", "bus menu 1-128", "Bus 33-34 (Stereo)"]



////////////////////////////////////////////////////////
//  Predefined Volume Options
let volume = chooseAnOption(["6", "3", "0", "-3", "-6", "-12", "-20", "-∞", "Custom", "Cancel"])

// If Cancel, stop script
if (volume === "Cancel") { throw 0 }


// If custom, prompt to type
// Only number is accepted
if (volume === "Custom") {

    volume = getCustomValue()
}



///   Open sends on all selected tracks
sf.ui.proTools.selectedTrack.trackInsertOrSendSelect({
    insertOrSend: "Send",
    pluginNumber: sendNumber,
    pluginPath: sendPath,
    selectForAllSelectedTracks: true,
}, "Path Not Found, check name spelling.");


const outWin = sf.ui.proTools.mainTrackOutputWindow.elementWaitFor().element
const panLinkBtn = outWin.buttons.whoseTitle.is("Link Panner to Main").first

let isPanLinkEnabled = panLinkBtn.value.invalidate().value === "Selected";

// If Pan link is not Enabled, Enable
if (!isPanLinkEnabled) {
    panLinkBtn.mouseClickElement({ isShift: true, isOption: true });

}

//Get selected tracks
const originalTracks = sf.ui.proTools.selectedTrackNames;

//Do for each track.
sf.ui.proTools.selectedTracks.trackHeaders.slice().map(track => {

    //Select track
    track.trackSelect();

    //Scroll track into View
    track.trackScrollToView();

    // Set volume
    setVolume(sendNumber, volume)

});

//Restore previously selected tracks
sf.ui.proTools.trackSelectByName({ names: originalTracks });

Hope it works for you