Hi OSTexo, just want to make sure you didn't miss my second post above...

Your additional picture above there helps to explain what you're looking for a bit more, thanks. But yes I think that like I wrote above just being able to put in 2 points as the pitch will not help you at all for your particular case here, because the particular distance you are interested in is not at a full revolution from the start point.

But I'd think you could measure the distance in z between those 2 points, and also measure the angular deviation between the start point and your target point as viewed down the z axis, then scale up that distance by the angular deviation to get the actual pitch value. I think...

- Michael