Richard Harrison wrote:
. . . Almost instantaneous
transmission between the first and last coil turns should be possible
were they tightly coupled.
. . .

Oops, wait a minute. Just a couple of hours ago you said the current
would have to wind its way around each turn, following the wire from one
end to the other, and that it would take nearly the wire length divided
by the speed of light. Have you changed your mind about how inductors work?

Roy Lewallen, W7EL