Love one, but I know I'd have trouble keeping it to 30/50/70'ish.
Even today, put my foot down as a car pulled along side as we joined the motorway after leaving the Malta Inn. That was with all my bells and buzzers going off and I realised we were in a 50mph area, so on with the brakes and hope the cameras werent looking. Not that I was going too fast, of course.
The derv goes as fast as you can drive nowadays, thats why I've not gone up to a 180, but I was tempted by one once.
Trouble is someone up Salisbury way snapped it up!!!