Cranky,
You forgot to add that most schools won't give you an instructor to ride with you unless you have two roll bars or one that goes completely across the interior (ref NASA HPDE). This eliminates almost all of the cobras on the road today. Not a bad rule, mind you, but just hard for the cobras to comply. I'm actually thinking about buying an older mustang or camaro to get some time with a NASA instructor before I go tearassing around an event in my cobra. Just to be on the safe side
h dog