Thanks for the heads up on the dynos Henry. I spent some time today tapping into the ABS sensor signals. It looks like it is not going to be quite as simple as just feeding the rear wheel signal directly in to the fronts as this seems to causes problem with the ECU looking for open and short sensors. I think I just need knock up a small circuit to derive two independent front wheel signals from a rear wheel sensor. I hope to do this tomorrow and do a full write up on my site when I have it figured out.