I never made those files! But the gloves are the same for all of the different suits, as far as I know at least, and the boots and neck could be taken from the mark 3 or 4/6 and would work just fine.
Very clean foam build coming along! And as for the under-harness you're building... That is looking awesome so far! I don't believe I've seen a full suit that opens and closes for one to climb into (beside's Jame's Hulkbuster that is). Definitely looking forward to seeing progress on that. And I see that you have a human model underneath the armor. How are the pieces fitting or lining up? As I mentioned before in a previous post, my original files were scaled exactly to the proportions of the movie suit which wouldn't really fit over a typical body. I'll have my V2 files uploaded soon and those should be suited for better fitment.
On a side note, I just messed around with After Effects and did a tracking test of the suit.
https://www.youtube.com/watch?v=csQScmNnbOk