Thanks John, now that you mention that I do remember George saying that it could be the secondary. I'll definitely check it.
I have pulled the secondary out once before, when I cleaned the primary i decided to do the secondary as well. I bent one of the spider veins a small bit when putting the spiders back in because it was a tight fit. I'll try and do better this time
ie: I took the veins out, while connected to the secondary. Should I just unscrew the secondary on its own and leave the veins in?