Thanks to boofhead who mailed me the pictures a while back, I will be making the same type of one for myself. Not for track use but just for looks.

Mine, I will however make a small modification at the bottom end in the centre by putting a small sprinkler system tap thingy of plastic to drain yearly.
Will also post a pic when done.

Great and cheap idea that works.
Just read about the 2litre recuired for CAMS rules. 2 litre is quite big can. The catch can will almost be the size of the A12 motor.