The BC in my woods were crowded, it seems I always had to take fallen oak branches off the crowns of the BC. The oak overstory was huge, and branches seemed to die and fall, the spread crown of the cherry would catch these. Maybe in the winter with the snow and ice, this would cause leaners with the added weight on the bendable BC's.
So maybe now with the release I gave them, and i cut the knocked over saplings at ground height, i will have some straight growing BC's.
Curt