Thanks everyone for the nice comments . I drill the holes to 1 3/8" . It is big enough for sparrows and wrens and too small for starlings .. The house is attached with 4- 3" screws . Once they are removed all the insides slide out for easy cleaning .
I see you added a nice railing detail to the front…looks good!The Cape Cod I built for my step daughters grand parents finally has birds in it! It only took about three years for the finish I used to off gas enough for the birds to use it..next time, I'll go with the same sealer you use..