Originally Posted by lilredsmiles
For the v-cut, you have to separate the two halves ever so slightly or they will fuse together & let it open up immediately as soon as you've sealed the edges.
For the top & bottom of the stack, I just ran my woodburner through in a straight line a few times. Each time I did, it removed a little bit of the polyester & eventually left a void. I haven't tried taking out a v notch yet.... But I imagine it would work well too.
Thanks! Guess I'll just have to practice the v-cuts!!!