Axial lines for circle or arc

Would be very nice to have this button or command.

When you select a circle or arc - it automatically creates axial lines (centre lines) for it. Preferably with “centre line” line type.

http://metal.brightcookie.com/2_draw/draw_t5/media/draw5_2_5g6.jpg

I tried to search for this but didn’t find anything similar.
This command would be very handy when working with a lot of drawings.

This might be a good starting point:

https://github.com/mcneel/rhinoscript/blob/master/CenterMark.rvb