It is obvious that the magnetic field force is a relatively weak field force. It is surprising but a no-brainer that smaller surfaces same ampere must have a stronger tesla as a result. Really interesting.

How many teslas do I need to push a 4 Mega Newton. When using more coils, this can be achieved. Twelve coils can reach that goal easier than six coils. right?

Multiplying 4MN / 12 coils makes .7 or .8MN per coil. And you have a perfect wormdrive. --Christian K.