Gareth,
When I first saw the pictures load up, I thought you were going to say that "I made these earlier" and I was about to eat my words and apologise (if you could do thinks to that standard). I then read your post and saw that you recognised quality when you saw it and actually stuck your hand in your pocket that time . Personally, I think (as Paul has done) you would have been better off attempting these and buying a plenum - not the other way round.... There are no consequences of making a hash of cosmetic bits (unless they're that bad, they chewed up tha cambelt ), you get the plenum wrong and feed too much air to one cylinder and its engine .