Well I'm not trying to crash the party with a Losi but if you can see them there are weights on the battery holder. I'm running the Max Amps 6000's totally awesome packs by the way.
The weights can be purchased from Xray its there sedan weights they work great, they also come with round ones that can be fit on the nose to keep the front end on the ground. I can put up a close up if you like?
And the Orion 4800's fit perfect to.
I servo taped the weights and then zip tied them. They fit like they where made for it. And I will add the extra weight helps a lot when running lipo.
Let me know if you guys want a closer shot?
Now I just need a paint job like the one above. Very talented.