Thanks.
You should really address @NeOS who, an expert, has actually done it.
Those who are familiar with locking hazards might install and lock later when the Android SPL has advanced sufficiently.
However there are some who take that route inadvertently who come back with different “how to lock safely” concerns.
My advice if you know that relocking is important to you is to wait till it is safe to install and lock exactly as the Install page.