Hi Gil,
I have installed 5 sets of Planearound 180 latches with friends and customers. (new aircraft and re-fitted on 10 year old aircraft )
I have been flying for four years in my RV-10 and have many, many, non-aviation passengers for the local scenic flight. (whale watching season )
They all hop in and close the doors with no special briefing.
With all that has been written about the doors on the '10, I have played with, pushed, twisted and jammed stuff half out the door trying to understand how it is possible to not latch correctly and with the Planearound centre latch and Stainless pins correctly installed and adjusted, I do not think it is possible.
By the very design of the centre latch, the door has to be closed in the cabin top recess before the centre latch can engage. The door pin guides centre the door and once the centre latch is rotated approx 90 degrees, the door pins then glide through their guide blocks and into the door jam.
I am very vigilant about my doors and it is on my checklist but I have confidence in good design and operation.
If you have an RV-10 and do have doors that you have to wrestle with, please have another builder have a look at them with you to understand what is not right.