Juice,

This doesn't exactly answer your question but I thought you needed to know that the TNC is one of the best tachs you can buy and If you compare it side beside a cheap one, you'll never have anything but a TNC.

They are not made anymore but a Guy on here is in the process of purchasing the rights and should have some before spring.

Do a search on here for TNC or for Tach and you will come across the story.

Enjoy,

Jim