I use a cutter to lightly cut on the connecting points before pushing the wooden pieces out from their moulds to avoid irregular broken off edges.
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This is also what i do 
the safest way to get no chips or breaks!
I always do as well.
That feeling of the thinness and breaking it free. I know the feeling. I recently made a sniper rifle scope and it has the bendable ones and it scared me so much
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I also do this with very small parts. With large parts, I carefully push them out with my hands. If you gently wiggle the pieces back and forth, they break off cleanly.