Everyone here should know Colin Chapman's quote on regulations
There are IMHO 5 skills required to win
1/ the ability to drive the car faster than it wants to go
2/ the ability to set the car up
3/ the ability to use the regulations
4/ the ability to learn from one's mistakes
5/ the ability to find the money
Neil you have 2 or 3 of these qualities, so I'll state Class A is for your car, unless of course you already have that ability and are just ducking out
Lawrence