Yes! I need to punch a finished book because if i punch loose papers or sections, I may not be able to align the punched hole while binding.. A power press seems a reasonable proposition. I have seen envelope punching cutting a thick stack. I am not aware of envelope business. Anybody, any idea on how and with what tool steel they make punching dies? any services available for dies? I have a 10 tonne power press. May try that. will be grateful for help.