Gredy has a new e manage. The e manage Ultimate. www.greddy.com From what I can see, other than it has a lot more to it than the first one, it also looks like that we could actualy control ignition unlike the first one. It says that you can control both ignition and injector on an individual and group firing. This means that it will work on our 420A? If so, then I'll sell my current one and get the ultimate rather than getting the MS.