You know Cosmo, what you say makes a lot of sense. I am not overly fond of OD unless I am traveling farther and want to go faster. For that it's great. Around here locally, most of my driving is just local speeds, and I like the feel of the engine helping me slow down when I'm off the gas pedal. Don't know why, I just do. Lots of vacuum gauges out there though. Are any of them better or all pretty much the same? Only want to do it one time so should get a good one. Thanks for your thoughts ---- Dale