I've reached my limit of tuning by ear and I think it's finally time to buy a tachometer. I am looking for some suggestions. While cost is important, getting a dependable (accurate and durable) tool is more important.

If engine/prop size matters, we currently run .42-53 sized engines, but have .75 and .90 sized two stokes in the pipeline, pending and increase in flying skill.

Thanks in advance,

Jack