Hello, new to the Caterham scene having been in Lotus Elise's for the last 15 odd years. I now have a 2005 ex academy K series car and loving it! I am wanting to build a Titan LSD I have acquired into another sierra diff with a new bearing re build kit. Question is: Can I just buy any sierra diff assuming its got the 3.92 crown wheel? And do I need to use a specific rear back plate or can the Sierra diff back plate be used? Thanks, Jody.