Why don’t you just buy new QC35s and a new uflymike? I upgraded and my 15s still worked...I just gave them to my kid. I know pilots are cheap, but it’s a tiny fraction of that PS check. Guessing you got your money’s worth out of the 15s at this point. Just my 2 cents. 35 was worth the upgrade. 25s/35s can be had for cheap now too.