Plant 3D updating ConnectionManger config doesn't get saved.

[zv_odd_101]

I have the below function to update the joint Slope tolerances. 
Updating the values in the ConnectionManager.config (from PnP3dConnectionManager.dll)  instance appears to change the values. 

public static void ChangeAllJointSlopeTolerances(double tolerance)
{
    var ed = Application.DocumentManager.MdiActiveDocument.Editor;
    var project = Autodesk.ProcessPower.PlantInstance.PlantApplication.CurrentProject;
    if (PnPProjectUtils.GetActiveDocumentType() != "Piping") return;

    var pipingProject = project.ProjectParts["Piping"] as PipingProject;
    var connectionManager = pipingProject.ConnectionManager as ConnectionManager;
    var jointsConfiguration = connectionManager.Config.JointsConfiguration;

    foreach (var joint in jointsConfiguration.Joints)
    {
        joint.SlopeTolerance = tolerance;
    }

}

But then saving the project doesn't update the config file that stores these values : in Plant Project folder DefaultConnectorsConfig.xml

I'm probably missing some fundamental information about how saving and updating internal databases works. Any pointers to documentation would be appreciated.

[jabowabo]

I don't think slope tolerance is saved anywhere but the .xml file. Why not just change it there?