Slide along attachment point

[llevine]

Hello, thanks for this great extension. Sorry if this is a basic question but is there a way to slide a rope along an attachment point? I'd like the rope to react the way it currently does with an attachment point, but when enough force is applied to the rope it pulls the rope through using the attachment point to anchor the position. If there isn't a simple way to do this, would it be possible to use a cursor to increase the length on the side that's being pulled and decrease it on the other simultaneously? I'd really appreciate any thoughts. Thanks.