In the end I won't make it to the World Champs in a week's time due to obligations so I thought to buy myself a new toy for comfort.
It's a nice little speedo based on the HW V3. Well, 'based' is an understatement. I think it is exactly the same.
For the time being I'm having a hard time finding the best orientation on the A700 chassis since the wires are on the side and not at the back as they were on the beloved ORION R10 Pro. This is an issue only for this type of car with the motor positioned along the chassis' center line.