Here you can see the custom lightweight flywheel mounted to the hub. The first photo shows the alignment of the flywheel and the face of the motor side adapter flange.
Installing this piece requires some care and precision as the distance from the face of this part to the face of the transmission adapter flange to ensure a proper engagement of the drivetrain assembly.
I will try to post a video of the motor spinning up with the flywheel mounted. The balance seems very good at speed although we did notice some small vibration as the motor comes to a stop. The test was only done with a 12V battery so no real power was thrown at it yet. Next step is to take the flywheel off and get it balanced to the clutch before putting it all back together and into the car.
