I figure I paid for the stamp so I can 'redesign' it to fit my needs. I have used my Exacto knife to cut out solid portions of a stamp that puff out and get inked. I also separate the sentiment portion and it stick on the side of the wood block if it is mounted. I have cut clear stamps apart also.
When I change the stamp to fit my needs, I am able to use the sentiment or image in different ways. By changing the sentiment, the stamps can often fit more occasions-I.e. thnk you, thinking of you, happy birthday, etc.