1951 stucco house in Lakewood Cal, so heat loss is no problem. MIL bought a new door with big window. Post office won't allow her to install a mail slot like old door because it would be a foot too low.
She is too frail to step outside to collect mail from a mailbox everyday, so she wants me to install a mail slot in the wall that will allow mail to drop onto the floor like she is used to with the slot in her old door.
Something like this looks good to her and PO likes that letter carrier can insert mail with one hand - no outer flap to lift up. http://www.mailboxes.com/product.asp?catalog%5Fname=Mailboxes&category%5Fname=Mail+Slots&product%5Fid=439&parent%5Fcategory%5Fname=Residential+Mailboxes&Related_Product=&sCondition=&Previous=yes
The task seems straight forward enough - cut outer slot in stucco and inner slot in plaster, install shop-built sloping guide channel for letters, screw outer and inner face plates to faces of guide channel stock.
Has anyone done this and have suggestions for design of inner channel that worked particularly well for you? Or what you tried that turned out to be a bad idea?