I have just spent a very frustrating day, as i am sure many others have, attempting to install crown moulding in my kitchen. My house is rather old and the walls are far from true angles which is why I elected to cope my inside corners. I have moderate knowledge of woodworking tools and feel like such an idiot right now because my corners have such large gaps!!! I am totally dissatisfied and am ready to tear it down, trash it and start over!! Only I don't know what I am doing wrong!! I am cutting my angles on the 45 degree upside down and back cutting the profile with a coping saw. I hold it up and its not even close!! My question is does the size of the moulding matter when setting your mitre saw angle? And does it matter if the moulding is hung upside down? I am using the reversible "easy to install" (HA!) pre-primed moulding from local box store. Please help, my husband is very aggravated with me right now and ready to hire out for what I think should be fairly easy project.