Hi,
It's now up on the Ecosystem, it comes with an editor file where all the work is done for showing the cylinder. I also modified the effect of Space property so that it affect both the position and rotation, making it very easy to do offsets and all.
now debug works in editor when you don't play, so you can set it up very easily during editing.
Drawing the cylinder is not easy, but manageable, I took the internal code from Unity Handles class to get it done faster, interesting vector maths when you can't use a transform.
If you have questions, let me know
Bye,
Jean