Getting used to and does not fit on 2 of our 3 wheels

We have three bikes (1 ladies Touring Bike 2 mountain bikes).
Only at our HAIbike legs mounted on the handlebar was possible with some improvisation.
A steer is severely limited what rapidly reduces the security, my wife did not want to ride it because you have to do this very strange Verränkungen with legs and arms, and so the balance suffers.
For me useless and dangerous.