Hi Tom..
That is a great video of how to use view ports and is exactly how view ports should be used and the way that Autocadd operates as well.
The only thing is you'll notice there was never a B.O.M. imported or any annotations added such as section views or details.
I suspect, from my experience, that is because CAXA Cant seem to handle having the B.O.M on the layout while the 3d views are in model space.
As well, you cannot create sections on layout space for items that are in model space. In order to create sections, you have to first create the sections in model space, but the caveat is that for the section annotation to be displayed properly when you go back to layout you must know what scale the viewport is at and then scale your annotations appropriately.
It really is a messy way to draw.
However, if you just pick a space...model or paper and drop your 3d views there and use the scaling function of the view creation dialog (ie set your scale at view placement) just like in ICD then let CAXA deal with the dimensions it all works nicely.
cheers
Peter