Item number:
251472697611
Ebay if you can wait mate
tried a power chisel once keith in a bid to speed the job up, ended up having to get half the wall plasteredno substitute for meticulous hand chiselling which results in perfect fit with no bodge required, I like to drill say 6mm holes around the marked out box line and then some within just to give yerself a fighting chance
nightmare like but that's sparkying
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