This has probably been answered but I haven’t found it and it’s a more general question. How long should a drag chain be? Should it be equal to the length of the axis? Somewhat bigger? Smaller?

Tye flexible portion of a drag chain must be 1/2 the movement range plus 1/2 the circumference of the circle that the drag chain bends in. That assumes that the anchor point is in the middle of travel.

Thanks!