R
Rich
No, not really (I wish walls were that flat!) the bigger the tile - the bigger the trowel and the more important the back buttering. Solid bed and 100% coverage is the same thing. I see what you are saying but I would still recommend getting some goos quality trowels. I only spread enough for a couple of tiles at a time and then build out/back butter accordingly. If the wall is that far out, then it should be sorted out before tiling.