With my old jango gauntlets, I had taken some foam weatherstrip from walmart, and it had sticky stuff on one side, i doubled them up, and put 2 pieces on the top and 2 on the bottom, and when i put them on, they stayed on there really snug and also kept the sleeve and glove in place as well.
Here is an example style pic of what it was like:
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Thats the way i set them in each gauntlet, bout 3 inches apart.