EDIT: Forgot to mention. 2003 AWM (tip but I don't think that matters for the PCV)
In the diagram below, which parts of the pvc system should I replace as "maintenance". This is what I was thinking so far:
6 bleeder valve 035103245G
15 pressure regulator valve 06A129101A
are there any other pieces I should replace while I'm at it?
Also, I'm wanting to install an oil catch can. I've sort of beat this to death in the past but I thought I would run my current plan by everyone and see what you all think. In order to catch as much of the oil as possible I figure I need to run it from the crank case breather line and the valve cover breather line, so...
I thought I would run a line from the end of 2 (before it connects to 5) and a line from where 13 connects to the valve cover. I would tie these two together at a "T" (since most catch cans only have one in and one out) and run the line to the inlet on the catch can. Then run the "out" line from the catch can to another "T" to split the line and go back to 2 and 13 to connect them like normal. This should keep the system operating normally, there would just be a catch can in line to catcht the oil. Heres is the above image with my idea sketched in
The other option is to run two catch cans. But I don't see why my system wouldn't work the same way. Let me know what you think.
In the diagram below, which parts of the pvc system should I replace as "maintenance". This is what I was thinking so far:
6 bleeder valve 035103245G
15 pressure regulator valve 06A129101A
are there any other pieces I should replace while I'm at it?

Also, I'm wanting to install an oil catch can. I've sort of beat this to death in the past but I thought I would run my current plan by everyone and see what you all think. In order to catch as much of the oil as possible I figure I need to run it from the crank case breather line and the valve cover breather line, so...
I thought I would run a line from the end of 2 (before it connects to 5) and a line from where 13 connects to the valve cover. I would tie these two together at a "T" (since most catch cans only have one in and one out) and run the line to the inlet on the catch can. Then run the "out" line from the catch can to another "T" to split the line and go back to 2 and 13 to connect them like normal. This should keep the system operating normally, there would just be a catch can in line to catcht the oil. Heres is the above image with my idea sketched in

The other option is to run two catch cans. But I don't see why my system wouldn't work the same way. Let me know what you think.