I am considering purchasing a set of Walsh Shuttle pipes. They have a set with 2 drones & a set with 3 drones. I am wanting to play along with a hammer dulcimer can any one give me some advice? And are there any considerations I should look at as well that I may not be aware of. Or would a set of small pipes be a better choice. I understand the shuttle pipes are tuned to A 440 is this an acurate statement?