Good idea, it'll help ME get some practice using inventor. That'll take a while though...
Spoiler for a clarification of what I am seeing:
I used to think I was fairly competent at this, but I have a question: You spec out in the flat pattern that the bottom 'flange' is 2.21 wide, but the finished bent flange is dimensioned at 2.25. I know I'll feel foolish in a moment, but how do I bend up a 2.25 flange from 2.21 of material? [EDIT] Never mind, I see it now, up top you allow 0.05 for material thickness, well on the bottom you lose 0.01 for the 'bump' so 2.21 +0.05 - 0.01 = 2.25. Toldja I'd feel foolish.[/EDIT]
As far as that whole area, what I think I see is just a 'bump' in the flange, right? That is, the flange is bent up 90 degrees, after 1.25 it gets bent 'down' (away from the viewer's eyes into the page) 44 degrees, then bent back up 44 degrees (net change zero). The drawing of the bent part seems to show it bending up then down though, however that can be a trick of the downloaded image resolution and the interference with the dimension lines.
Don't look at the spoiler if you're going to model this, better you interpret it your way, not mine.
Don