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don't forget strategic placement! do think of some ideas to place your mesh so that when the tech comes down, you can have a more proper evaluation of the system..
My layout is similar to endissorrow.. The router with the master mesh is at one end, in the living room, and the slave mesh is moving around the other end of the house, in the rooms. Depending on usage and need, have to move the slave mesh around, sometime rest it higher on a shelf, sometime on top of the desk, sometime just put it on the floor. But once the mesh starts talking to each other, the connection is smooth. And if you want to project the coverage further, further testing of placement locations have to be look at. The good thing about the mesh is that it is small and easy to carry and move around.