Why are the holes in HMC punched for 8.5×11 paper instead of A4?
It is not easy to get A4 paper or notebooks in North America. Since that is where Harn is published and where a majority of the Harn customers are, HarnMaster Core and it companion books are being published for American-style notebooks. While it would be possible for the printer to put in more holes to accomodate A4 notebooks and other styles of notebooks, some of the holes would overlap and it would significantly weaken the holes against tearing.