I can’t see, hear, smell or feel the bottom drain in my boat from the interior. I HAVE to install from the exterior. I do use the flip over over the “Tee” style only because of the ability to tighten it with my itsy bitsy sensitive fingy tips.
With that said, I can start my plug about 1/2 way into the hole and then have to give it 2 to 4 bumps with the palm of my hand to flip it up because I have it rather tight to start with. I have no access to my drain from the interior of my boat.
Our previous 18ft Crestliner very deep v outboard and the Larson 1850 runabout i/o were accessible from the interior.
I have never had an issue with a drain plug coming dislodged for over 50 years.