Your homemade tweaks?

1 1/4" copper couplings over the male, and female ends of upper end power cords - the only areas of most cords not shielded, Seems to reduce line noise and the system is quieter.

Lining my speaker cabinets with Dynamat (from auto parts stores) significfantly reduces cabinet resonances yielding improved clarity.

Replacing all driver steel screws with brass screws - noticeably improves clarity.

Elizabeth, great idea! Where for you find antistatic foam?

Cast off Corian counter top pieces from kitchen installers for amp or speaker platforms or on top of CD player to dampen resonance

Rubber vibration dampers used in industrial settings for equipment footers

Foam rubber playmats wrapped around large cardboard tubes for bass traps

Wheelbarrow tire inner tube in a homemade frame for an air cushion platform

Boos Block cutting boards are the best maple platforms out there at much less cost. Just put any feet you want on them or use blue tak?

happy-sad balls from Arbor Scientific. Throw away the "happy" balls. The "Sad" balls absorb resonances amazingly well. They squash down, so nothing is needed to hold them in place. All you have to do is drop one to see how effectively it absorbs energy. They hit the floor and stay there, no bounce - apparently the energy is all dissipated as heat. I have not been able to find any source for the raw material.