Stack Cutting is simply sensible if you are doing portraits and using Spiral Blades!
1. Eliminates having the 'fuzzies' on your presentation piece.
2. Spiral Blades are much easier to control with the greater thickness!
3. That bottom 'throwaway' piece can often be cleaned up and used for an additional sale or donation or gift.
4. You get to keep a copy of every portrait you cut IF you so desire...ALL my major portrait cuts are either hanging on my wall or in a file box for future use.