Pretty much finished the buggy now, just the lexan bits left to trim and fit. First race this weekend....!
I was able to get hold of some TA05 alloy diffs; they fit fine and are hugely lighter than the standard units (although I've got the one-way installed at the front for the time being). Only thing to note is they have a slightly reduced length over the steel (approx. 18mm vs 15.5mm from the inner bearing face) and so I would suggest checking where the drive-shafts rest at full droop (the way I have my car set at the mo there's no chance of them falling out, just making sure people are aware).
Couldn't resist attaching a piccy
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TRF501X small.jpg