Thought I'd share the mod I did to my T2 today. It's an 007, but I figure this would work exactly the same on an 009. This setup is a little bit different than most of the lipo wieght mods I've seen, because the weights are running right next to the centre line of the car. The best part though is that it is really cheap, and if your in college like me that is quite important!
It's not too pretty yet since I just threw it together today, so there is a bit of finishing that needs to be done on the battery retainers. The battery retainers were made from an old XB8 TQ radio tray I had lying around. The black anodizing is cool. I've got to redo the wiring as well since the power wires are to short to reach now. I also had ripped out all the electronics in an attempt to mount the on the battery side of the car, which wasn't a problem for the ESC (Tekin FX Pro, tiny), but after much rearranging I felt that this setup would put more mass to the centre of the car.
The lead running down the centre holds the battery in place and is taped in with Parma silicone tape. I've got 144g of lead there. The car weighs in at about 1450g. We are using a 1500g limit up north here this winter, so I've got to add a bit more weight yet, but we'll see what the tech scales read first. My scale is a postal style spring loaded scale, so I can't imagine it's ultra accurate.
The car should balance R/L perfectly once I mount my motor cooling fan. The battery is an SMC S-Max 4500mah, which weighs in at about 250g (If I remember correctly).
The best part about this is that there are no weights placed at the extreme front, rear, or right side of the car. All the ballast weight goes right down the centre. Plus the weights are mostly hidden.
Carpet season doesn't start here for a few more weeks yet, so it'll be a little while before I get a chance to test this setup out on the track.