WElcome back and Thank You for your service to our country!
I had the same problem as you in that my hands, especially my right hand, would go numb after maybe 20 minutes or so. So I went with the Helibars. While they did definately help on the positioning of my body, Im 5'9, 175 BTW, it seemed as though the vibes coming up through the bars got even worse. I think the hollow portions of the bars resonated much more than the solid stockers. I wound up bying some of the liquid bar snake and filling up the hollow parts with it. Its a major PITA but it helped a lot.
The one thing that made the most difference was the way I changed from using my hands to support me to my abs and thighs. Now my hands never get numb, and I can "get in the zone" much more quickly, without having to try and shake the feeling back in my hands. In the end, having the proper stance may be all you need. Try that first before you spend the money on other fixes.