basically, the only way to retain the 2 oil separators and flow direction that nissan designed into the system (non turbo), is to fit a catchcan between the pcv valve and the inlet mani
(and not the way most of the members on here have done)
As a group it benefits us to work together and we help ourselves collectively in considering each case individually for it's merits. Sometimes there maybe a one-fits-all solution but other times there may not and that should be respected on a general level