hot bodies diffs

hi all...neil those diffs come with plastic diff housing? makes me think so by what you said about metal inserts...i want ally ones if possible but i can make them..(there just such a pain to machine innards out). just would be nice to be able to put some thick lube in front diff and for it to stay in there longer than 5 mins...hmmm maybe sum oil seals.
hey is that an oil seal gap i see cut into the shafts on mike's webpage?? those shafts are to use original shafts or mip's for e maxx, does it work???
does the thick lube stay????
thanks all...