I was studying the pictures from the Arkel catalog for their handlebar bags. It looks like, from the pictures, that the bag has a sturdy set of D-rings to attach the shoulder strap for off-bicycle use. Below that attachment is a mesh bag. Could you somehow put part of the light assembly in the bag and the rest attach to the D-ring by zip ties. Would that work? Seems a lot simpler than some of the methods spoken about here. Has anyone tried this method, as I haven't gotten my bag yet?