"I was checking out their site and noticed that you don't need to sew on rank patches - they will hang from the temporary badge button under the pocket. I think that's a great idea!"
Let me offer a suggestion gained from years of switching unit patches on my flight suit: velcro. On my son's uni we use it for rank, position, patrol. makes swapping easy. I use it on mine for position. A friend who has switched units a lot (military moves) has it for every single patch on his shirt.
anyway, I know that wasn't the focus of the thread but compelled to comment