The rear diff had a few surprises, here are the pics.
For reference, It has 15off 3mm Diff balls and a standard thrust race assy, and you probably cant see from the pics, but the diff has two bearings either side, one large where the diff body runs on, and the inner which are as per a standard diff.
I've also included a couple of pics showing the Alloy front transmission housing and crash back / belt tensioning brackets.
That Buds Racing Products belt looks the business too... (Thanks Kaszal)