The center shaft can be upgraded. How is the TT-02RR's suspension more tunable than the TT-02S? It looks like the TT-02S' suspension links use adjustable turnbuckles like a normal touring car. The TT-02S' suspension also has fiber-reinforced damper towers, whereas the TT-02RR's suspension appears to use plain plastic damper towers. Is that incorrect?
Basically I'm trying to figure out if the TT-02RR is really worth $100 more. It looks nice but I'm not sure it actually includes $100 of additional upgrades.