Above is a good diagram of chain-line from here which discusses the issues of chain line shifting problems and is very relevant to my problems.


Here is the specifications for the Sram 2011 models with the most relevant page below:

Firstly it is interesting to note they specifically say NOT for tandems.
Next I assume We have the same chain as the disc brake model (45mm) NOT the standard model (42mm).

Here is a really interesting reference on gear and hub and cassette sizes

Here I found that the Spindle length for the triple ring crank is 118.5 while the double is only 109.5
under bottom bracket 5500 SI-1DG0C-000 downloadable document
Note my Cranks are FS5600 (front) and FS5603 (rear) which are the hollow tech ones.
This is especially interesting as we have a double crank on the front and a triple on the rear.

On the same page under the 5603 is the FC560s here: EV-FC-5603-2440B