[JellyBeanDriver]

I do the layout on the PC, laserprint onto vellum and use that as a mask to expose onto a pre-sensitized PCB. Then develop, etch and drill. I've done 7mil line/clearances. Pretty handy to be able to whip out a prototype that way. For my 2 sided boards I either use 4PCB.com $33 special in the US and for large quantities an offshore board house.

I don't think an inclinometer would work well as roads themselves undulate and there would be so much measurement noise from the josling car. The instantaneous MPG meter and your speedometer together should tell you when you're coasting, no?

Anyways, think I'll include a comparator/buffer on the VSS and injector input so if needed I can add some hysteresis.