Yes my friend both jet plate and the plastic insert is the correct parts for 2011-3, although could always try all 3 jet plates + the 2 inserts in different combinations just figured I go with what EK recommended for 2011-3 + 90 degree mounting of the block itself.
Maybe it´s already saturated in terms of cooling effect for a single CPU? I´m just speculating but then again I have only low/medium speed fans in pull config only just like I did with the 360 rad as well, since I went thick 420 rad over thick 360 I´m working even closer to 8 pin ATX/EPS connector and cable, vrm heatsink and even ram slots to some degree, I also lost the ability to slightly slide the radiator back and forward along the case itself now it fit only one way and have to work around that whatever I want to accomplish.
In the end of the day that mean I have only space for a single 140mm push fan if I want to add push fans, according to my own measurements I should be able to just get away with adding 2 push fans if I go 120mm + 140/120mm fan adapters, maybe if I am extremely lucky and prepared to cut into a third fan adapter + the fan itself I might be able to go full on push/pull using 140mm pull and 120mm push and I hope I can but not holding my breath at this point. Had I only not been greedy and gone XT45 then for sure I would have been able to push/pull a 120mm/140mm setup or even ST30 for push/pull 140mm fans all the way hahaha..?