Next update.
Firstly keep the seperate shimming sheet handy, when I was building the front diff cases I realised I hadnt shimmed the mesh on the rear as descirbed. So now I have to take it out for a second attempt
Firstly the nice touch with the lipo trays is some slim padding, as for size I have fitted some 6500mah lipos and they are snug and well protected, so no lipo fires and pins through the case (matt I know your reading this while poorly GWS!)