One point that I may have missed in reading the thread. Here the release lever must be in easy reach of the driver AND a safety worker if you plan to run the car on a track at all. That is one of the first things they looked at on mine when I had it at Thunderhill was to see that in case I was disabled, a safety worker could easily reach in and pull the release knob. I don't know if this applies at all tracks and in all states or not.
Ron