Ron,

When I open up my pre/pro's, one of the reasons I do it is to apply Pro Gold to any of the connectors I can undo internally.

May be worth doing if you have some and its still open.

Also interesting that there is no IEC/filter combo. My G68 doesnt have one anymore either - hahahaha!

BTW - My G68 had a ferrite ring (from the factory) immediately after the IEC/switch/filter combo. The line & neutral incoming power supply wires were wrapped one time through it. I moved it to the ground wire, as Anthony does.