Capture Mechanisms
I guess the hardest part about the application of a capture mechanism is going to be the need for safety. {I don't know, but I am assuming that "Of Course I Still Love You" has no human crew at the point of capture.}
That being the case, perhaps Musk can adopt some technology from his "other" company. Tesla have already demonstrated the "self-attaching charger snake" - i.e. that robotic unit for your garage so that you can get out of your Model S at your front door, only for the car to park itself and attach the charger without help...
Now, with a few examples of that, strengthened and suitably scaled up in size, there has to be a way that Tesla could mount a selection of those around the edge of the landing platform in such a way that they can be swung in to place.
In the descent phase, the 1st stage rocket pops out some small flaps at the upper edge [where it separates from the second stage] that act as drags to keep the motor oriented and descending "rockets pointing down". The same mechanism that is used to pop open those flaps might be able to pop out and reveal some anchor points for robotic, self-attaching anchors.
And the cool part would be that all the complex and heavy tech for that could be mounted on the drone recovery ship, thus not adding to the gross take-off-weight of the Falcon...
Important not to loose sight of the achievement, I guess. In 30 years NASA came up with capsule splashdowns and a dead-stick orbiter return. in 30 *lauches* SpaceX are dropping a rocket motor the size of the Statue of Liberty onto a ship in the middle of a force 8-9 gale in the ocean... Impressive
Biting the hand that feeds IT
