["Three new and improved, 30% roomier birdhouses"]
Recently I came up w a suitable way (though more time-consuming) to use the same wood yet produce wider models (below). I made the sides longer and attached them to the sides of the front and back faces.
["The interior is now the full five inches wide"]
["Trim at front and back hides the butt ends. Looks AOK"
The 'full-on trim day' will now last a bit longer but the birds will hopefully give the spacious interiors a thumbs up.
["Trim day will likely be next week, after a few 'paint days'"]