Hey Old Sloppy,
Wow!!! Ol' Rafael there needs to work on his people skills a bit. Last time I checked arrogance and vituperance weren't supposed to be a part of these forums but questions were. I "have" done research on tachs recently and found there to be over a dozen different ones available in several different ranges of rpm and price. I have been involved in R/C helis for over 12 years (mostly nitros and recently electrics) and have used several different types of tachs. Some of the older ones operated on infrared spectrums and were iffy at best. The newer opticals are much more accurate and are widely available. If one browses the R/C hobby sites you will find them. Also, some of the higher end models are offered on some of the electronic suppliers websites and some of the precision tool suppliers sites. Even some of the automotive racing supply sites have them. I just recently purchased a 'Glowbee Intellitach' from techmodelproducts.com. Cost me only $24.95. It's range is 0 to 32,000 RPM. I have used it on my nitros and my electrics. I have compared this tach to the 'fancy' digital lasers and it is right there with them.

Rafael
There ya go bub. Someone stepped up[>:]. If you're going to be critical and rude, then I suggest you do some "research" yourself before spouting off. Better yet, if you're going to be like that-DON'T RESPOND AT ALL[:@]!!!!