Had any luck?
If not, try cupping your hand over the back cap ( not covering the lpr) to confirm if the leak is coming from the back cap. obviously if it is the back cap the air leaking noise will be stifled by your hand. if it proves to be the back cap area and you have replaced the outside green bolt orings, Try replacing the end orange bolt tail orings ( grease them well) on the bolt piece. As It could be leaking through the middle of the back cap
