Has anyone, besides moi, had less than satisfactory results cutting a material known as foamcore? I have used a variety of hobby blades, single edge razors, tried multiple cuts, tried cutting from both sides…and still been left with shreds, voids and a definitely “I’m not having FUN yet” look. Any suggestions. Like the idea of the material as a mock up, due to its self supporting nature. (Jury is out on ease of use).