Be aware that there’s a difference between some v1.0 board and later ones - they moved the antenna slightly to the right, and older cases don’t fit. I’ve made one of these and can confirm it fits the v1.1 board, so if you compare it visually to any other design you want to use you should be able to tell if the antenna’s in the right spot.
Someone else posted their own version here (3D Printed Cases etc) that has buttons on the bottom and a larger USB access opening, and the antenna looks right to me
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