I thought I was happy with my 25A SE (hell, I thought I was happy with the new-sculpt custom that took me 2 years to finish), but when I got my 25A Beach Head and "fixed" him (gave him smaller legs so he'd be in-scale), I knew I had to re-attempt an "ultimate" Snake-Eyes.
So I found another batch of Wave 2 today and got home and started on 25A SE Mark IV:

I think he looks more "Commando" than before. Yes, he still has the visor & the sword, but BH's sweater really seems to make a difference. I painted the sweater in Citadel "Chaos Black" and the rest in regular Model Master Flat Black - you can hardly tell from the pics, but the subtle difference in color looks really cool in person. His arms look a big scrawny, but I think a change in gloves might fix that (give him some tapering at the wrists), but for now, I'm diggin' him.
Side-by-side with a "factory" SE (notice the height difference -a major reason I wanted to do this custom.)

With my modded BH -

The happy couple:

Straight-up Commando-style:


Oh, and here's my BH side-by-side with the Hasbro version (can they ever get a scale right?)

Cheers!