Hi Brennan, The blast template is designed so that the negative space is the extent of each blast template size/type. So, if you can see through the blast template to the minis below then it is in the blast template radius. I matched this up to the book, and it lines up as expected for this design. I agree that the cone template is a little slimmer near the tip. I will fix that and upload an update. Thanks for your feedback.
I always use maps and minis in my tabletop RPG games. This ingenious product is going to be a game changer for showing character conditions and keeping everyone on the same page!