If you ever email or write the company or talk to Ron, tell him Eric Powers from
"About.com" sent you. He'll get a kick out of that. I am in the process of writing a review the ScanGauge and he has been an excellent resource. Nice guy and very smart. Someday I'll have to share the story he told me about how he came up with the idea for making the ScanGauge.
If I didn't make the disclaimer before, I'll make it now: I am in no way affiliated with ScanGauge other than doing a product review of it.