I wonder what has happened to basic fundamentals, as far as the proponents of such a technique are concerned. Cruising at a higher LRC speed ( assuming the econ speed is somewhere between LRC and MRC ), at a lower level whilst at a higher gross weight is probably not a sensible idea unless if are really going to be stuck for a long long time at lower levels, or the wind trades are better at higher levels a little later down the route. Just wondering.........