No, they haven’t. I’ve installed three sets and there is no ability to lock the doors from inside, without installing electric locks. I did not install electric locks because there is the potential of not being able to unlock the doors if accident happened and you lost electrical power.
That being said, I love their product due to the safety advantage and the ease of door closing. A bit of work to install them but pretty straight forward procedure. They have excellent customer support.
On my 51 I did install an exterior key lock on the drivers door so I could lock each door from the outside if need be. I live in rural Nebraska and have never locked the doors. Probably more of an issue for folks living in metropolitan areas.
