I really like the bull dog body. I will keep it in mind after I destroy my body.
As far as fluids go, in mine I run 20-100-10. I only bash and I run it w/a 1520 on 5s and it's a beast. Make sure to check diffs for shimming....my stock 5T needed shims to make sure that there was NO play in the diffs
What I do for batts trays is have Mike custom make them to my batteries dimensions so that they are snug and do not move. I do this on all my rigs and it has worked out well.
Here is a pic of mine from a yr ago....since this pic, I have switched radios so no big antenna, blacked out all my wires
1. MBX-6 T8 1900KV, RX8 ON 4S
2. MBX-5T 1520, MMM ON 5S
3. MBX-5 ONROAD CONVERSION 1515, MMM ON 5S
4. MRX-3 ON ROAD CONVERSION 1512, MMM ON 6S
5. TEN T 2650 T8, MMP ON 3S