I came across the Black Lion Audio website. They make modifications to gear to improve it. I don't necessarily think there is a big problem with the gear I have, but their offerings have peaked my interest and have got me wondering how much of an improvement these mods would make. I have an AI-3 and 828MKII, both of which they do modifications forand it looks like they change out the opamps. I was just wondering if anyone has used them or has heard some before and after comparisons of equipment they have modified.