Very good cheap microphones for what they are

not the best in terms of value for money, super profitable for starting out

The microphones are great, they are of very good quality used on diatonic accordion. But when too much air comes out of the accordion (for example, when the air valve is fully opened), you can hear the accordion's breath noise. I haven't found how to fix this problem, the windscreen is not enough. On the right hand side, you can hear the clicking of the keys quite a bit. Maybe I need to find a microphone position that picks up less of the keys.