What's the verdict on the Blitz Dual SBC Spec R (dual solenoid)? I have a friend who's seling one and says it's the older model. I know they have a new series out and I think that's what he means that it's not the new dual solenoid setup. Is there any difference between the two aside from cosmetics? Would one work well with a single? THanks in advance for opinions. I wanted to try a very good boost controller to compare what my AEM is doing.