I managed to get a bit more time last night and got the new front diff together and the new alloy diff hangers fitted.
Which has hi lighted a problem my alloy top deck is about 3mm or so too short so when everything's tightend up it's tensioning the belt up too much.
Also the front gearbox housing is too far back as a result and my SX3 steering mod is fouling it. So I'm now looking for a FRP top deck to go with the chassis but failing that I might have to see if I can get a carbon one cut from somewhere.
Rallymaddaz if your reading this could you get me the lengths of the bell cranks your useing to see if there shorter than the alloy ones so I can rule that out.