Er, well that won't make too much difference. The TB02R parts are all hard to find replacements for. Unless you have a new TB02R kit then you'll struggle to find all the parts.

You need quite a stiff setup for drifting, and usually that lies in the spring. The damper oil makes little difference, because anyone with any sense would just use a different piston ring with less holes in! The medium weight oil you get with Tamiya shock sets is perfect for all applications. You only want soft springs at the front, a stiffer rear end induces slides.

Chris.