Hi Tig

I have clipped my Inteli-touch guitar tuner to the bar holders and tuned that way. Mine are 12 and 15 bar harps. I don't like 21's. However it is probably best to buy a cheap stick on pick up and get a good chromatic tuner to use when tuning.

What Harpy said about strings is true but replace all of them or the sound may be spotty. I prefer the sound of old strings my self but then I'm deaf and my harps are amplified.

Don