Well, its just another way cars are like chicks...
Their undercarriages need routine washing and care. You can have the hottest girl out there, but if her undercarriage isnt up to par... thats a no go on that boberry biscuit!
the guy with the carbon fiber shaft --I think---stated taht about 80% of the clunkiness was gone...can't remember what else he eupdated--flywheel,etc...
I have the FRPP one and I found the car rev'd easier and it was smoother. I bought it cause it's stronger and I figured it would take out some vibration. So overall I was happy with my purchase.