Mine is just like a go kart...a triangular flange at the bottom of the steering column, which the
steering arms attach to. You can vary the 'speed' by how far the attachment of the arms is from the center
of the column...simple, cheap, and feels very alive!
The CK I've had a go in with a rack (Wolsey Hornet) is very civilized.
You pays your money and takes your choice.