What a waste of money

I've been trying to make this chinese puzzle work on my cutting board since December when I purchased it. What a waste of money. When you try to set it flat on the cutting board there is this what plastic tab that is a permanent part that keeps you from doing just that. I've taken this thing apart and put it back together 20 plus times and even though it says it's designed to work on your cutting board, I can't for the life of me figure out how????? When I do get to the part with just the blades sticking out, it just grabs onto the nuts and won't let them go, there should be an apparatus for the blades to go back through so the nuts don't stick. SCREAM!!!!

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