Every six weeks for over a year my little Hoya inflata flowered for me without fail, but the plant itself would never gain any new growth, and would occasionally lose a leaf.  In the long term this is not sustainable, so I have finally taken the plunge and cut the plant up into six tiny cuttings, which I am now trying to root.  Here is a photo of the flowers which I cut off so that I could take the stem cuttings.