Anyone have any experience with "Mu Metal Magetic Shielding" material (as offered on autotoys website? I'm [still] looking to remove the last bit of empeg native cpu noise from my car system. It is heard during quiet segments. I was thinking of wraping the sled with the material. I believe the non-iron stainless case isn't very effective at blocking emissions. This "Mu Metal" stuff is very expensive (about $40/sq. foot) and I'm still paying off my empeg ;) so any advice is most welcome.