The legs is both tall and wide. Dubean claims he's 5'9, 1.9 is his ideal scale. I'm 5'10 and I used 1.9. Since I'm muscular, I find the chest piece perfect for my size. However, the twin shoulder blades on the chest piece are way too narrow. I don't think I would be able to wear a helmet with that. The only way to wear the torso is to separate the back and chest pieces. So, I am redoing the war machine with 2.0 on chest and 1.7 on shin guards. I also had a problem with thighs. The 1.9 on thighs are a little tall but too narrow. I wasted a lot of resins. I bought a Smooth Cast 300!
Since you are in the Air Force, I believe you know more electronics than I do. However I wanna give you an info for your gauntlet guns.-Try Miles tag sound modules.
http://www.lasertagparts.com/mtmicro.htm. You're going to need cables,LED (Muzzle Flash), buttons, and a speaker. I know a lot of stuff about motorized face plate. For motorized mini gun, use a power drill motor. I recommend a super light weight materials especially pvc pipes. I was a terminator endoskeleton and it gave me a back problem. Make your mini gun a light weight because you are going to mount that at your back.