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Had some time this morning so I brought the fuel rails in to clean them and I am glad I did. Look at the flow from the far left nozzle - or more accurately look at the lack of flow!
Cleaned that out and all 8 flow equally now. Parts washers are under rated, grin.
I can't remember if I was able to press mine in with my hand. If not take a socket of similar diameter with an extension on it and lightly tap it in place. It should not take a lot of force.