It's indeed very easy to build. At first I wanted the numbers to appear somewhere on the dashboard but it's really hard to pass through the glove compartment and near the front wheels, even more if you added a HOG. If you find a way, I'd be very interested to see it.
Thanks for all those upgrades! I did a little one I find rather cool. It's doesn't really help the transmission to work better but it enhances the realism of the Porsche: working doorlocks!
It was a bit hard to build because the space between the door panels and the seats is very small. But hey here it is: