....
bending such a small tube
An inlay from 1mm brass rod was the solution
Bending worked wonderful smooth
but i need not a ring but four 90° parts.
inner deburring with a small ball end mill
and welding on the screw wich hold the axle onto the c-hub
to avoid length-changing while steering.
On the other side, a servo and a small n20 gear motor has taken their place.
together with two end switches for the motor, they are the rest of the mechanics.
A short clip of their work,
you can see here