i.imgur.com/Js2FHme.png[/img:z4zr6ll8]
Just to add that using unbounded scrolling, the display of the layout can be centered more easily, that combined with a use of the anchor behavior can help starting out (of course your approach is still valid, but to beginnyou might want to look into simpler methods first), that also will make the layout view useful (placing everything by code can be done, but the layout view is easier to do this kind of work)