SampleMan some good lessons learned from your post, such as locking the door, keeping distance, recognizing the threat and taking actions to prevent e.scalation, AND BEING AWARE OF AFTERWARD CONSEQUENCES even if everything you did was legal.
When i first got my CHP i discussed holsters at the range and asked about center back carry like the guys on TV, say NCIS LA. I was told it’s dangerous because you could fall on your back and your back will break before the gun will. Mine is 4 o’clock IWB.
Center back was driven by the carpenter’s belt i needed and bending work I was constantly doing.
I don’t carry that way any more, but it did then.