I purchased a DVD about FMQ for newbies. In it, the instructor said that you never want to FMQ with a full bobbin; you always want it about 3/4 full. I must have missed her rationale for this statement, although she seemed to elude to the fact that a full bobbin causes tension difficulties.
As a newbie, and someone who desires to learn FMQ, I am curious as to whether others follow this rule or not. Any opinions?