Attention Dave Leonard,

Want to help Paul and everyone out?  I suggest you buy one of these cheap
laser turbo tachs.  This one is  40 pounds sterling but you can probably
get it cheaper in USA via Asia direct.

Paul will show you how to separate the components so you can have the
display in the cockpit and the sensor aimed at the compressor blade
inlet.

http://www.gyroscope.com/d.asp?product=TACHOMETER2

Might be a kit available now as laser scanning has become a ripe
technology.


Doug in Japan

I am available to help at any time Dave.

Paul Lamar