brad thats the nismo separator youve got. nice bit of kit that.
ive been doing a fair bit of reading up about the whole deal over the last few days. the problem is everyone has different setups and people always swear by theirs so theres heaps of different info out there making it hard for the useless bloke like me to decide what the best way to go is. if your mind can handle my mad paint skills, below is the setup im considering. this will still retain the factory pcv setup and is completely sealed and legal. if the can is getting filled to much i could also run a line from the drain plug on the catch can to the dipstick but that would mean getting a baffle welded into the can and using some steel wool to filter any shit out. alternatively i could do as you suggested pete and run an autech style can between the rocker covers.
so the blue lines are the factory oil lines and the red ones are the catch can lines. inside the short blue line from the intake is the factory oil restrictor/oil to air separator. it looks like this