I have heard good things about this one: * https://www.tindie.com/products/petl/usb-c-cable-tester-c2c-caberqu/ https://www.tindie.com/products/petl/usb-c-cabl

I have heard good things about this one: * https://www.tindie.com/products/petl/usb-c-cable-tester-c2c-caberqu/ https://www.tindie.com/products/petl/usb-c-cable-tester-c2c-... but I have no experience with it, so I can't recommend it personally. You should ask on the /r/usbchardware subreddit. They are generally a friendly bunch and have experience with these exact use-cases. EDIT: re:color code marking: * https://sa.lj.am/usbccccc/ https://sa.lj.am/usbccccc/