UPDATE:
Due to time constraints I have no way of getting a decent undersuit together, along with a secure means of attaching the armor to myself. So I decided to modify my build and go as more of a "Tactical ODST" than a Spartan.
I pulled out my airsoft chest rig, stripped it down as much as I could, then rearranged it to fit over my armor! (Gotta love MOLLE). The result looks like a cross between Halo 5's Nightfall Armor and Reach's Counter Assault chest! Best of all, I now have a secure and comfortable place to hang straps for my should and leg armor!
Another plus side is because I'm wearing BDUs underneath instead of skin-tight black under armor, theoretically the suit should be slightly cooler to wear. (Being an airsofter I know just how hot these things can be too )
I've got my Scout Shoulder and Buttplate traced to foam, and the gauntlet cardstock cut out. I needed a break from all the tracing, so I went ahead and modified the weightlifting gloves I got at Walmart for 7 bucks with some 6mm and 2mm craft foam! I think they turned out great and are very flexible.
Until next time (I have a lot of work ahead of me by Thursday xD)
Cheers!
-S247