I'd like to do my own throttle body sync so that I don't have to spend the entire Saturday at the dealer again (busy summer season). From what I read on ibmwr.org it seems fairly easy to do, all I need to get is a differential manometer. What are the requirements for such a manometer, apart from two inputs so that it can do differential? I'd like to get a digital one if they're not too expensive. What are the requirements? E.g. range, resolution. Anything else I need to know before I start on this project? A manometer is the only 'special' tool I'll need, correct?