Eco Deal
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I think as has been suggested the tiles couldn't be removed close to the ridge (or the edge) without disturbing the concrete settings. Oter than that the nibs should be ground off to allow the tile to sit down. it won't go completely flush but certainly better than these. Removing the nibs does not weaken the tile at all, although grinding the actual body of the tile may, especially if it's ground out as much as one of the previous photos to fit conduit through!
nothing wrong with that method !! it will be under panels etc so nobody will jump on it !!!