I am looking to replace a metal door with a wooden door on my granny flat entrance. My current door measures 1850mm length and 850mm wide. I’m looking at buying the Corinthian urban primed entrance door for $256. The measurements on the new door (like most of the doors) are 2040mm x 820mm. I am not worried about the width I can fix that but the length is what I am not sure about. I would need to cut 190mm off. As the new door has a pattern I would need to cut app 95mm from both the top and bottom of the door. Is this do-able?? Please let me know if my plans are the best way to do it? Thank you in advanced