Lol I dont know what you guys are smoking?
I cut the pipe that goes from the manifold to the plastic breather elbow on the inlet elbow. To check the size I got a 15mm copper pipe out of the van (im a builder) and bingo, it fitted in nice and tight.
I then bought a 15mm Internal Diameter Mini oil breather WITH 15mm OD barbed hose joiner. The joiner was pushed half way into the breather and halfway into the breather pipe, I then secured these with jubilee clips. its a very tight fit and will not be slipping off I can assure you of that!
Although the breather is not directly above the exhaust, I'm going to get a longer hose and direct the mini breather further away and hidden, I like stealth.