Andreas is a brilliant man and I'm sure his book is going to help you a lot. One thing Andreas said to do was take some pantothenic acid before each flush. It loosens them up. Whenever I did that, I got a lot more stones. Why not get more out, so you have less flushes to do in the future?
What's nice about pantothenic acid is that it's a safe vitamin to take in large doses, so you can take 1,000 mg per day and get a super great flush after a week--plus pantothenic acid will help your skin a lot if you decide to continue taking it. Best of luck.