Hi Ade, thanks for your very kind offer of your old catch tank. However, I'm quite eager to get it sorted this weekend so I can take the car away for easter (I live quite some way from where I garage the car so don't get the opportunity to do any fixing during the week). Think Auto is closest to me (although still quite a distance) and open on Saturdays, but as far as I can tell only do the alloy tanks like yours. Any thoughts where I can quickly get hold of a plastic catch tank, certainly until I determine whether it is spitting out very much at all...