Thanks guys, I haven't tried it yet as we are in the middle of the annual. It should be ready for engine run in a few days. I looked up the optical and laser tachs and they seem pricey. One of my pals suggested I contact the local RC guys, as they use them a lot. Another friend suggested I just buy a new tach as they are cheaper than the optical tachs. I think I'll try the ramp lights, just to see if it works!