Oops - I was just looking at the assembly to see if I could shrink it without too much work (I can), but I noticed an interference between the attenuators and the feature in the upper case that is supposed to hold them in place when it is closed.? See image.?
I will fix this and upload new versions of the upper case shortly.? Mine was printed with this error, and it still closed, so the actual amount of interference is probably less than what is shown, but it still should be fixed.
I will also be sharing some images of a narrower version later...
Stay tuned.