Nozzle 2 is a lot quieter.  1:298 seems to be the required gear reduction for accuracy & braking.  The sigmoid curve seems to give the right step size.  The slow speed is negligable because large movements tend to be only made by presets.  For small movements, the speed isn't noticeable.

1:75 wasn't enough to hold it in a sideways right angle.  1:298 gets the job done.

It took a long time to enable the full range of motion with nozzle 1 because it requires the user to manually center it before arming it & there was a good chance lions wouldn't remember.  After the psychological barrier was broken, nozzle 2 has the same full range of motion.