In searching for info about AU diff swaps, upgrades, ratio and centre (LSD) changes I think I've searched and read every possible relevant topic here at AFF but I still don't have all the info. I couldn't find any info about this in the technical stickys above in AU.Falcon.com either.
I thought I would start this in the AU section so that those who have done diff swaps can tell others exactly what works.
Please don't reply here if your sister's boyfriend's mate's brother remembered hearing something about this from some bloke at the footy a few weeks ago and you're not sure if it's right, etc 
. I would hope that this becomes the definitive topic on what works and what doesn't!
Hopefully a moderator can work with me on this topic to delete any incorrect info that is added and compile a good list of what is known to work.