Bird house

This is the third version of the bird feeder-planter-bird house series I have designed based on the same outer shell.
This being the bird house !
I began with google figuring out what the hole size should be for the door.
Google came up with 1 to 1.75 inches diameter.
Because of the odd shape I had to try and hit the average width and height .... I'm confident that a typical nesting bird like a wren for example will have no issues getting into this (might even be slightly big for a wren)
Moving to the bottom .... I wanted to be able to clean nesting materials out as well.
I tried printing several different threads before settling on Acme for simplicity in printing.....I designed some extra clearance on the threads for easy assembly and a screwdriver slot in case the plug gets tight over time.
The last part in this series will be a mount to hang from screws on wood or suction cups from glass.
Thanks for looking !
As always please join me in saying F%&K ALS !