I just got done with the second batch of 30 bird houses... I did steal your idea for the pivoting side for cleaning them out on this batch.
There was a trapper in this area that used to put up bluebird houses when he was checking his trapline, and the bluebirds and tree swallows pretty much occupied them all in a year or two.
We have the mountain bluebirds here, and they seem a little more finicky and timid than the western bluebirds I've seen.
