I was introduced to Nielsen's Bevel Accents during the WCAF Show in January. Great product! I have a question regarding the "left over" pieces. The instructions indicate to slice the left overs a little less than 90 degrees so they can be used again. Instead of doing that, I cut them at a 45 degree bevel on my manual mat cutter. They line up as perfect miters when reusing them. Am I missing something? I do not understand the instrustions. Any help appreciated.