If I can chime in as a long-time lurker who finds info on IFE-box-legroom-invasion especially useful: Based on recent experience, section 5.4 is accurate for non-reconfigured 330s. But on a 33B, E and F in the middle block seem to have the box instead of D and G. Also, in this case the box appears to be a lower "bottom" on the seat in front, instead of an actual box that takes up one side of the leg space. Not sure about the side seat pairs.