Is 90' house nest good?

We have 180', 135' and 90' nest.

Is it advisable to have 90' nest?

In our recent visit to various bird's house, we noticed that,the fatality rate is high when there is a lot of 90' nest. Further to our investigation, due to lack of space for extension of wings during stretching, the possiblity of through out one is high. Maybe we probably should not have 90' plank in our bird's house.