First recommendation is to ditch the garbage honda ATF that's inside the trans. Z1 is basically a nothing special Dex-3 fluid that has a bunch of friction modifiers added to it. DW-1 is a bit better, but it is even closer to a dexron fluid.
I've been running the Valvoline Maxlife Dex/Merc ATF on the recommendation of several people on Bobistheoilguy. Less friction modifiers, higher flashpoint, and it costs $17 for a gallon of it, rather than $8 for a quart.
That and a trans cooler will take all of an hour and a half to do, and will go a long way to making your trans last longer and behave when you are inevitably beating on it.