Goldmund Cones, "Best of" in their day, still useful? under what component?

I just found my "vintage" Goldmund Cones in a box full of old parts that I had forgotten about.  As far as component isolation footers, there are unit solutions some "hard isolation" and some "soft isolation" units and then a wide variety of highly-engineered compound components.  Just for the fun of it I intend to experiment with placing my old Goldmund Cones under various components.  I remember that there were strong proponents for cones under CD transports/players vs soft solutions, cheap classic be Vibrapods.  I would appreciate which component type you guys would suggest might be best served or perhaps none at all given they are all tube based: cd transport/player, phono preamp or preamp.