I was very discouraged after failing with Hoya soidaoensis for the second time.  Once again I had rotted the roots out on the plant from my too heavy handed watering.  This time I took cuttings, used my regular mix, and put them into a two inch net pot.  For the first time, I could see by looking at the sides of the pot when I needed to water.  It was critical with this plant.  Just before the plant became totally dry, I watered.  I began to get much better results.