Jude and I talked and looked at parts for the bread board electrical connection bits yesterday. I had some ideas, as I realized that the connections are rows, which all have common bus connections. (5 pins per side of the center dip trough)
Springyness seems to be key and springy metal seems to be in short supply at the HF. I thought a strip of aluminum sheet, rounded over )( kind of like that with weather stripping or something firm but flexible behind the bottom of it might work well. (AL does conduction, weatherstripping provides spring) I happen to have both weather stripping and thin AL sheet, so I'll bring some in to play with.
One other thought, if anyone knows what the magic juicy stuff in 3M Locktite connectors ( the kind you squeeze with a pliers to lock and make air tight ) is, would that help with conduction, or is it just to prevent oxidation? It would make the parts messy, so maybe not the best approach, but thought I'd throw it out there.