Barry, the picture you have taken is of a sonic nozzle.  Personally, I think sonic nozzles at all four locations, when using a third intercooler, is a good idea. The sonic nozzles on the cold side will reduce the pressure rise time slightly on takeoff.  This is a problem on an all electric aircraft as you need a vacuum supply to make the Dukes valve control the initial rise.  The cold side nozzles will also reduce the pressure loss in the event of a cold side failure such as a skeet tube blowing off.

Craig Berland