If it's happening mid way, then the wires are not the issue, however if it's popping out when moving towards stop when almost there, then it could be.
I sometimes find some cables a little hard to seat, to work around this I tend to attach tricky cables during carby assemply, passing the cable though the intake, and pulling it through enough to be able to then use pliers to push the ball into the rotor hole till it clicks in, then fitting the rotor and setting the cable sheith end in place.
I personally have not tried bending the cable, if the problempersists at this point, i find a new rotor, but it is an option if no spare rotors are about.
The ramp is indeed LM (this is a google pic) but aside from that it's the same, it was simply added to prevent stopping problems, and increase cable hold, the wall at the end of the ramp is still there on the early models, and it's contact with the pins has the same effect, when the pins are removed, this wall can move further, which is how the cable is supposed to be released.
