The net issue is pretty easy. Mine has quick release top and bottom.
The performance rating is, of course, way too logical.
Trouble is, it shifts liability. The clubs lawyers won't go for it in a million years, even after a dozen martinis served to them by strippers.
Why?
Because, with a performance standard, the SCCA has deemed what is acceptable, and what is not. In the event of an incident, the widow has an easy time finding an ambulance chaser who will hang the case on the SCCAs decision that XX seconds was an acceptable egress performance, when her husband died in a fire that engulfed the car in XX minus 3 seconds. Or any of a zillion similar incidents.
Sadly, the whole SFI thing is loved by lawyers because it spreads the liability.
And it's not about successfully defending cases like this as a club, it's about not having them brought on the club in the first place. The sad fact is that when a suit is brought against the club, the club loses...whether the suit has merit, or is won, or not.
Common sense is fast being driven to extinction by avery litigious society.
(Look at the Porsche Carrera GT case in Cali. The widow of the passenger (who himself owned a Lamborghini) is suing every last breathing body that was on the site the day her husband climbed into a Carrera GT with a guy he'd NEVER met, went driving thru the infeld of the Cali Speedway at 165 MPH, swerved to avoid a slow moving Ferrari just coming out of the pits, lost control and slammed into a concrete barrier, killing both, ...at a Ferrari "Drivers ed" event. There were so many mistakes made there that she's going to be in court every day for a year, LOL. But ..the biggest mistake, made by her husband, (Unknown driver, goofy club event, no restraints, ultra high performance, known inadequecies in the track, etc) is being ignored)