If you go to the link mentioned, (https://phantombullet.net/threads/never-lay-a-crank-shaft-on-its-side.5367/) (first picture on page two), one of the repliers showed a pic of factory storage of finished cranks
and said the factory doesn't adhere to the BS about not storing cranks us-supported.

If you look closely, he is mistaken, the cranks ARE supported properly,
i.e. supports under the second main from each end and nesting slots for the balance throws.

Joe