Call me crazy. I've owned my B4 since 2003 when it first came out. Of course this was before the Factory Team came out so I ended up doing a full upgrade.
I give mine a tear down into sub assemblies and clean once a week. Once a month I disassemble the car down to screws and parts. At this time I check over everything for wear and unseen damage when the car is together. To be completely honest, probably the only original parts from the car are the tranny gears and the CVDs.
I just replaced the tub chassis after beating the hell out of the original carbon composite chassis I installed back in 2003.