have you guys tried lightly taping the unsealed areas between the bulkhead and the diff gear covers? a few pages back someone has demonstrated this with pictures showing us what the unsealed area looks like and the sealed area looks like.
a even quicker way is to apply a thin layer of silicon around the diff cover seals but its just abit of a mess everytime you take the diff covers off but its worth the small amount of time in rubbing the dry silicon off
hope this helps guys
oh yea i cant wait to get clear diff covers while building the chassis i was so tempted to leave out the diff covers cause it just looks so sexy like that