If I've got a good seal should I be able to run the backflush procedure with no leaking from around the edges, or is that too much to expect?
It should not leak (mine never did) and your opv may or may not "squeak". They are set very high from the factory and when I backed mine off it would. You may need to get another group gasket, I seem to remember NS had some differences with them. I never had to change mine or address this.




