This is what mine looks like now, with the electronics robbed from it.
The battery packs sit on either side of the transmission in between the side body posts now. The springs are Traxxas Tan (4.1) up front and Black (4.4) out back, with P2 rockers. I'm tempted to step up to some stiffer springs and giving her another go. This project kinda stalled on me due to other vehicles that are more fun to drive really fast on the street and yard in front of my house. Currently the handling is alot better with less body roll than before and seems less than in your videos. I think thats mostly due to the sway bars though.