I have had a Globee tach for over a year now but hardly use it. It is very difficult to obtain a good reading with it. I have tried into the sun, away from the sun, black props, grey props, wood props etc with the same results. Is it just a bad design and they all are not very reliable or was mine made on friday afternoon before a three day weekend?

I have had many tachs and never had any problems like this. One of the main reasons I bought this one is the fact that it uses cheep 9v batteries in lieu of the smaller watch style ones $$$.
Thanks,
Jeremy