Nice! If you still have the tracks lose so they can be removed, you might consider adding some bare metal effects between the guide teeth (guide horns) and the inner surface where the road wheels roll inside the track. Those areas are constantly polished by the action of the road wheels, the return rollers, the idlers, and the drivers. Dry-brushed metallics or even a silver pencil will work.
FWIW, I generally start painting with the silver now, and then add strips of masking tape where the tires of the road wheels contact the inner track surfaces. I can usually get away after that with just some careful airbrushing of the rust colors. Peel off the tape and then maybe use some silver Rub-n-Buff (metallic colored Carnauba wax... AK now sells their own analog, but Rub-n-Buff has been around since the '70s, at least) and polish a bit with a Q-tip ("ear bud").
In any evert, you've "cracked the code" on how to paint and assemble the suspension. Most other tank models will go pretty much the same with minor variations for small differences in design and desired weathering effects.