Implementing haptic feedback on the Vive Pre

Has anyone been able to get haptic feedback working on the Vive Pre (or even the dev edition)?

I’ve been playing around with it, but I haven’t been able to get anything to happen. There’s almost no documentation for the feature, so it’s tough to know if I’m even using it correctly. PlayClientForceFeedback works fine, by the way, so I know that vibration does work.

If someone has got it working, any examples or help would be greatly appreciated.

I’m afraid I don’t have any advice, but we were able to get it working with normal ForceFeedback effects on the IInputInterface