Hi,
Thanks for the reply. This is my second c330 and I never had a problem with the first. I've been through the manual very thoroughly, many times. I'm not sure I've ever heard two clicks, but I do apply firm, even pressure to both sides when closing the back. Are the two clicks close enough that if you press quickly it could sound as one click?
The pressure plate is in the 120 position.
Thanks again,
Daniel