Maybe the Mosquito has a tendency to keep tracking straight because we don't seem to have a problem steering by tucking the tiller between the backs of our upper and lower legs while kneeling. To actually steer we just rock our feet from side to side. This seems to give plenty of control while freeing up both hands for the halyard.
I was pretty amazed to see the talk of cleating the spinnaker in that other thread. I find the spinnaker needs a lot more adjusting than the main, and in a howler you have to be able to let the spinnaker go in some of the bigger gusts, otherwise the only way is down
Once again I'm talking about Mosquitos, and maybe this is different for cats with more main and less spinnaker.
Tim