I'll add those weights to my Amazon wish list if I can't find something similar near me.

I only have metal sprockets at the moment, but plan on adding metal tracks and sprockets. The stock HL springs are way too resistant to act as proper suspension. Some might see it as adding problems to the tank, but I prefer added weight for (what seems like) better traction and it will make use of the suspension.

As much as I want a full metal model, the two local online tank retailers in Oz haven't received them yet and they are out of my price range at the moment.