You are correct GK, all of this was stated clearly by Tim himself many posts ago.
The magnetism on the larger cards was just there to aid in placement for locations like breaker panel doors etc, or you would be out there with the Gorilla tape!
I am pretty sure Tim also said the mini cards would be approx. 1/10 the size of the larger E mats and also a corresponding 1/10th as strong an effect.
But the advantage is being able to place into or under smaller units like small Schiit headphone amps or similar small casework DAC.
The magnetism on the larger cards was just there to aid in placement for locations like breaker panel doors etc, or you would be out there with the Gorilla tape!
I am pretty sure Tim also said the mini cards would be approx. 1/10 the size of the larger E mats and also a corresponding 1/10th as strong an effect.
But the advantage is being able to place into or under smaller units like small Schiit headphone amps or similar small casework DAC.