I just for the life of me get my head round the catch can

[Nino]

  I have no idea why I can't get this, all the stuff I have done to my car the basic Catch can, PCV simple install I have read and read guides and for the life of me im going full retard trying to get my head understanding it 

Anyway this is my understanding so far, please correct me as I need to nail this. 

[dom]

No, the T pieces goes between the rocker cover and top inlet of the catch can and goes down to the block opposed to the hockey puck.

The lower catch can inlet goes directly to the hockey puck.

Excuse the poor edit of your pic, but you'll get the idea:

[Nino]

Thanks Dom, so If I follow what you have edited, I can do away with all the extra pipework that connects to the Elbow part that attaches to the block?

[dom]

Thanks Dom, so If I follow what you have edited, I can do away with all the extra pipework that connects to the Elbow part that attaches to the block?

Yeah, ditch everything other than the elbow

[northeast_gti-t]

Thanks Dom, so If I follow what you have edited, I can do away with all the extra pipework that connects to the Elbow part that attaches to the block?

Yeah, ditch everything other than the elbow

As dom has said  plus be careful with the plastic elbow they can be quite brittle 

[Nino]

Im sure i have seen an ally replacement somewhere. What about the break booster line?

[Wazzzer]

Just run it as a single line to your inlet manifold, works fine for earlier cars so can't see why they changed it TBH, just over complicates things

[rio_gti]

Ask rocketmonkey about the alloy replacement 

[Nino]

Just run it as a single line to your inlet manifold, works fine for earlier cars so can't see why they changed it TBH, just over complicates things

you mean the booster line? so run from the bulkhead to the side of the inlet mani?

[Wazzzer]

You got it. Just make sure you keep the one way valve in there