I love a Goodwood track day and have taken a 4 wheeled Morgan and an Aston down in the past. I'm just not that confident that the 3 Wheeler would survive the day. I'd worry that it would shake itself to bits and then it would be a long walk home
Why do you think that would happen? they are not delicate or fragile vehicles and there are no potholes on the track so if anything it would be less harsh. You may get wet if it rains but the car will also not dissolve
I would imagine a few circuits would challenge the Centa drive rubbers...
