well, i bought a logitech extreme 3D usb joystick and the steim junxion software.
junxion is transforming usb joystick messages in midi controls: that works very well and in a very easy way with all controllers, except with ..... the surround pan !
it seems impossible to send x and y messages to the surround pan in Logic, as when learning the midi controller assignation , the surround pan in logic only reacts as angle and diversity controls, but the logic pro 7.1 update infos do mention that surround joysticks do work well...
apple support does not accept to answer my question, as i bought logic more than six months now, (i think its a pity that apple bought logic , for this problem of support)
I asked steim support if they know how to do, i'm waiting for an answer...
anybody can contribute ?