I was unser the impression ... no ... I was told the NXA Cranks could not be rebuilt?
To be honest i would not have a clue where to start with checking what you have suggested Steve, i am a simple person in a complicated world, at lest in here
I do have a new Crank and a pair of new barrels and all associated seals, i just wanted best value out of the ones in the bike ... without an impending crank case replacement or even worse ..... A highside on the left hander of Craner .... That would be more costly than money can be held responsible for