Thanks for your help fellas, but the situation has now been resolved.
RMC gave me incorrect information which unfortunately I passed onto the RTA. RMC informed me that the Steering Shaft they supplied was from a VC Commodore which is totally incorrect.
The shaft RMC supplied was actually manufactured by them from AISI No.4340 grade Bola Steel back in 2007. This steel is a highly stressed chromium conponent for use in the aircarft and automotive industry. It contains .3 carbon, 1.5 chrome, .2 M.O., 1.5 nickel N.I., 1.658 DIN and 34 CRNiM06 if that means anything to anyone here.
This is a photo of the Intermediate Steering Shaft fitted to my Cobra. It looks nothing like the pic., posted by WKB of the VC Commodore shaft. so how could RMC get it so wrong?
I suppose that the problem arose around 2009 with RMC when the management changed. I purchased my kit and associated parts in 2007 and none of the management or employees from that era are still employed there. Finding old records has been a major draw-back and just another thing to prolong my build time.
I have discussed the revised information with the RTA and they are prepared to accept that the steering shaft has not been cut, heated or welded in any way and therefore do not require the tests and x-rays outlined earlier in this thread to be conducted. The RTA are willing to accept a certificate from my Engineer outling the metalic characteristics of the steering shaft. I should receive that report from him in a couple of days.
Once again, thanks for the offers of help.
Baz