Case for XH-M372 Audio Isolator Ground Loop Noise Isolation

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There is one of these you can buy that is already inside a case - but I don't trust anything from Aliexpress if I can't see inside it! This is for the XH-M372 Audio Isolator with headphone jacks like this one https://www.aliexpress.com/item/1005004310923142.html I had horrible ground loop noises with a USB-powered amplifier that was sharing the power with a Raspberry Pi providing the audio. This seemed like the simplest solution and it worked great. Just a very simple case in two parts with no supports needed and held together with 4 small counter-sunk wood-screws. It's a secure fit even without the screws to be honest! Make sure you experinent with the line width to make sure it's not got gaps and fits together okay. Some of the parts where it overlaps are one or two lines thick.