How to cut FELT with Your Silhouette - video tutorial, will kill a mat fast. Doesn't always work great. I found contact paper on the back of the felt and then painters taped to the mat works well. Blade speed thickness or less so it doesn't cut the mat.
Turns out the Knife Tool in Silhouette Studio Designer Edition isn't as boring and useless as I originally thought. Take a gander at these 7 things you didn't know it could do and watch the video to become a Knife Tool Ninja!