Hi I don't know if anyone can help me, I have recently purchased a Princess 30 DS, with twin diesels on shafts. The boat has mainly been used at sea, I have now moved it to the Norfolk Broads where it will be necessary for me to fit a holding tank for sewage waste. However, I am having difficulty in finding a suitable place to fit the tank, if anybody has a 30DS with a holding tank fitted, please could you let me know where it is fitted.