Hi I'm going to get our lounge smashed to bits by a builder relatively soon (removing stone clad fireplace - yuk!). I'd like him to dig out channels and lay cables for my front speakers and TV too. But I don't have the TV yet. Should I buy the TV, mount it and connect cables first - then when he comes round just remove the TV part and let him do his business? Or work out where the TV will go and just draw lines? Is there anyway to calculate where the cables will hang from a TV before mounting it? (considering 37" JVC DS6) Anything else I should be aware of? I'm probably going to upgrade my current Sky to HD next year, so does the cable need upgrading? It currently goes across the lounge, so I'd want that hidden too - so if it needs replacing I'd do it in advance. cheers!