Just a note: for anyone who doesn't know Chris he is a very knowledgeable and talented photographer, who has assisted many people in many ways especially in drum scanning. While getting into scanning with a drum it seems very difficult and risky not knowing the equipment , it's origin, nor the operator beforehand.
This is the one person who you can leave your worries behind, and if you need a very good scanner, do not hesitate. This is the one, and being sold by a person who will see it through.