psycho - to reduce the amount of air drawn in through the new vent - what I have done is make a pinhole for the vacuum suction. this happened by chance as the T-piece connector i bought had one end closed shut (during the moulding process) - so i pierced this end with a pin to make a 1~2 mm hole and thats what the ozone (or air!) is being sucked through.
As a result - the vacuum is very slight.
I suspect that I'll have to check it in a few days and might find it choked!
