Lol...that's some funny chit.
When I drove a z turn I quickly learned that you can go super fast or be accurate and that there is a happy medium between the two.
You can do both Huck. It just takes more than an hour or so on the machine. It also takes the right machine. Some machines require the abilities of a fighter pilot to keep them straight. Others my dog can mow laser straight lines.
Geoffrey was on an old diesel Grasshopper. Not the best for keeping straight. Not the worst. It is slow in the wands and power delivery is about the same half throttle or full throttle. Kid doesn't need to learn on a "nervous rabbit" twitchy assed mower.
Since I am horribly derailing this thread, my apologies go out to CJD. To bring it full circle, here is my advice on keeping it straight at full speed. You will notice one wand generally pushes forward a smidge more than the other. Push the short stick all the way forward. Hold it there. Now make your adjustments on long passes with the longer throw stick. This allows maximum speed with minor adjustments in your lines. Thread is back in your court CJD. Sorry for the side track.