Hoya walliniana was not a very easy growing Hoya, and unfortunately I did lose the plant, but fortunately not before I was able to flower it.  I would recommend the plant to advanced growers as it is not suited to beginners.  The plant was not forgiving of mistakes, and when I tried to save it through taking cuttings, I was not successful.  If I ever get the chance to try the plant again under different conditions, it might well fare much better.