Thanks for all the extra info Les.
I will be ordering my OS upgrade within the next few weeks. Im a bit worried about opening up my esi but we'll see how it goes.
Im sure I'll be provided with adequate instructions.
Ive heard that the new filters dont lose as much bottom end when the resonance is turned up. I hope this is true. These 2.01 filters sure become thin and tinny when you start pushing them.