OK, if you don't need the cameras to "toe in", then that makes things a lot simpler. You might like to try the attached "StereoCamsNoToe_v01a.pp2", as an alternative to your method. It contains two cameras, "Camera_A" and "Camera_B". Camera_B is offset to the side of Camera_A by -0.028 PNU (-73.396 mm). Camera_B is locked by default and its rotations, translations, focal length, and Focus Distance are slaved to those of Camera_A via ERC. This means that Camera_B should follow almost everything that you do to Camera_A, maintaining a side by side stereo view through dolly and orbits. The separation of the cameras is implemented via extra xtran channels in both cameras. If you want to change the separation, unlock Camera_B and change the min and max value of 'dollyX2', then re-lock the camera. You can also split the offset giving half to Camera_A and the other half to Camera_B' if you prefer it that way. Note that 'Restore Camera' will not work on these cameras, but 'Restore Element' will. If you are going to use motion blur, you will need to unlock Camera_B, and enter the fStop and shutter values manually, as these have not been slaved. To use the attached zip, you will need to loose the ".TXT" part of the file extension. Finally I would point out that this is experimental, I hope that there are no bugs, but make no guarantees. If you find any problems, or have suggestions for improvements, please let me know.