Originally Posted by Barry2020
The weights likely add to attitude stability under turbulent air condiitions.
That's the biggest part of it. The extra weight that far out helps keep the wind from pushing a wing up. It'll also keep the wing from lifting as much when you hit the edge of a thermal. Mine are still in. I never got around to removing them, and while yaw and pitch tend to bounce around a bit in my on board videos, it's very stable in roll.