hopefully this is fairly self-explanatory, but I'm trying to figure out the exact details for my new construction and looking for any constructive criticism that anyone is willing to provide.

*** IANAB (I am not a builder)

The details:

ICF walls
- 11.25" thick Fox Block
- Fox Buck - EPS bucking system (no wood)

Zola windows
- centered to wall cavity
- frame profile attached


Questions as numbered in my awesome flashing detail diagram: (and please criticize other things you may notice is wrong)
1) I assume the aluminum flashing should be angled, but what should i put under to support it? and how do I attach this?
2) Should I use backer rod? not bother?
3) I was told I don't need an interior tape with the uPVC windows. Any ideas why? (I have already asked this of the manufacturer, just haven't gotten a response yet.
4) Is it necessary or just recommended to insert the aluminum flashing into the foam?


Specific products I had planned to use:
Weather Barrier - Siga Wigluv 230
Vapor Open Air Barrier - Siga Wigluv 20/40
Flexible Spray Foam - Wind-lock Foam-2-Foam Adhesive
Vapor Closed Air Barrier - Siga Corvum 12/48
Caulk - ???? suggestions ????


Any suggestions or comments are very much appreciated. Thanks,