I just made some 2Pi's, and am in the process of making some 1Pi's. I love the way the 2Pi's sound, so I'm not going to worry about this. However, I hope that at some point you or others will comment on the inductor and whatever else may be helpful, and let us know if they are worth retrofitting based on actual listening. I don't mind an improvement if it's real world, but you can't listen to a spec sheet.

Matts