Well i have been playing with the assembly of the rear axle... nothing much to report here. it has gone rather smoothly... the only issue came when putting the left Caliper onto the rear disk, it wouldn't fit, because there wasnot enough gap betweenthe pads to slid the caliper over the disk.
In the end i had to call Caterham, and fortunately enough, the problem was not a major one. apparently the calipers piston can be screwed back (clockwise) using a special tool. or in my case (as per the discussion with Caterham's), you can place the caliper into a vice, and use a pair of thin nosed pliers to turn the piston head back and increase the clearance.

Well started to put in the differential today... and that has been a bit of a pig if i am honest..
Firstly the installation of the Dif is not easy on your own, so had to wait until the saturday to enlist the assistance of Darrell. The first obstacle was the fact that I have the new BMW Dif which is not the same instructions or fitting kits as those in the manual. so after some confusion and getting to grips with the various instructions we managed to get a plan of attack pm what we thought should be from teh manual, and what we thought should be from the seperate supplied instructions.
The instructions do state that you should instal the handbreak cable before the dif, we chose to do this later, which was not a problem to do after the Dif was installed.
We lifted the diff into place and through some difficulty we did get the lower bolts into location, the top bolt however was a nightmare to get into place. the top holes did not ligh up with the bracked and applying large forces to line it up was not a safe idea whilst working unde the car... so how did we get it installed?
With the long bolt mostly in place, the Differential still needed to be pulled towards the front of the car in order to allow the bolt to go into the left hand bracekt, to acheive this we needed to pull the dif forwards of the car, so we fashioned a Tornique, using some strong rope I tied it from the back of the Dif, to the A-Frame hole in the Chassis, and then put a strewdriver through the rope loop and turned it until it allowe the bolt to line up with the hole... simple (but did waist a lot of time getting to this solution)..