Please bear with me as I try to explain my issue. I am trying to use Oracle 651 vinyl to make tumblers. I have a silhoutte SD. I am using the blue cap with a force of 3 speed I think is 8. When I cut letters for a saying and try to weed when I peel it back all the letters stay stuck in the vinyl sheet they don't stay on the backing. If push on the letters are cut and will come off but they are not sticking to the backing. I have tried different settings. I'm wasting vinyl. I like the indoor vinyl seems easier to work with. I only got the outdoor because I'm selling the tumblers and I was afraid the designs are going to peel off. Even though the one I made for myself seems to be doing ok. I bought the vinyl from Nick at craft vinyl. Thanks in advance.