Just to shed some light on the 900 RPMs.... I believe the idle is increased for when it is paired with the new flywheel. Dinan's new flywheel has something like 40% less rotational mass so the higher idleing RPMs were designed to help prohibit stalling the car when it is paired with the new flywheel (less rotation, easier to stall the car when letting out the clutch).
This is what I heard, and I hope it helps.
