Hi All I'm about to start redoing our lounge and want to chase a channel into the wall to install some trunking to store all the cables for the TV. It's a 2004 house with dot and dab plasterboard on breeze block. The thickness of the plasterboard to the wall is around 20mm where I want to put the trunking and I'd ideally like to have some access to it via the top/bottom so I can change cables without taking the wallpaper off! I'm thinking 16mm depth trunking would be too small for 3xHDMI (possibly 4), ethernet and power to allow for easy removal of the cables so I was thinking something along the lines of 54mm x 28mm, which would mean carving a 54mm x 10mm channel into the breeze blocks behind the plasterboard to fit that size in. The other option would be 2 channels of trunking, 1 16mm x 16mm section and a 38mm x 16mm section with the HDMI cables in the larger section and power/ethernet in the smaller one, but I'm not sure all the HDMI cables will fit into the largest section. I'm trying to use the channel the previous residents created to reduce the amount of work (which consisted of carving out the plasterboard and cementing the cables into the wall, shudder) but am a bit concerned about taking too much out of the breeze blocks. Would have been much easier if the plasterboard was a consistent distance from the breeze blocks all the way along the wall (it's 30mm from the wall where the sockets are on one side...) What do you guys think is the best approach?