I have had this problem with a lot of sets and the only thing I can tell you is...it is next to impossible to be sure. You're right..if you cut it too close then it will wobble, BUT if you leave rubber you may get ink on the card from that piece of rubber. With Simple Sayings and other sets like that I usually cut close and then, when I stamp it, pay very close attention to what you are doing. I try to place all of my pressure on the stamp in the middle where the words are and not the entire stamp. HTH, though I am sure it doesn't.