Let's talk about the facts first... The new 2.0 chassis and it's parts are Aurora T-Jet compatible. It is made of Delerin. Delerin is durable and has some lubricating properties much like the original Aurora chassis. The chassis came with a guide pin.
The chassis has longer shoe hooks which keeps the shoes from falling off which was notorious with the 1.0 version. Based on my experience I really don't think it was a chassis issue on the 1.0 version as much as it was the pick up shoe issue... anyway this was also addressed in the 2.0 version... we'll talk about that later.
So let's get down to measurements.
The chassis is flat when measured with a tech block.
He has stated "In the past we used a delrin/glass fiber mix to control shrinkage and maintain Aurora compatibility. Unfortunately, adding glass fiber weakened the delrin. The new molds were made larger to allow for the shrinkage of Delrin and the glass fiber is no longer needed."