AKG C 516 ML

I bought this item to give some amplification to my acoustic piano accordion. It ha worked well and I am pleased with the product. My only minor grievance is that the sticky pad supplied to attach it was not strong enough to hold the microphone in place. As I don't want to screw into the instrument I need to find another way to attach it.

I've tried many accordion mics but this is the first that really picks up the bass.