Does anyone have a specific padlock brand/model recommendation to use on a Pelican 1200 case? I will be using this case to carry ammo on flights to SA. I prefer combination locks. Also, my understanding is I need to use TSA locks for this purpose. I bought two Forge 4-digit locks off Amazon and one broke the first time I used a TSA master key with it (something broke internally). Most other I have viewed have been tiny. Any thoughts or recommendations? Thanks