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  • Drilling through a pier supporting an RSJ. I need to get an HDMI cable through it ideally, that would require a c.20mm hole. There's a plug socket on one side which I could potentially replace one side for a modular socket. Would I compromise the wall by just drilling a new 20mm hole? The other option is to solder a new HDMI plug on to a cable, but that sounds tricky.

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