The Yaesu mic issue was discussed last year in this thread - Which Radio in Winter? KX2 vs 817/8
Your audio was starting to get a bit rough when I spoke to you, but as you know it deteriorated and the output power diminished. I bought a spare mic after it happened to me, but I don’t actually carry the spare up hills… it’s more for multi-summit activations where I can swap mics when back at the car. Then there’s always CW. 