Hmmmm....... I've been scratching my head over this programming request all night. It seems to me that Oddjob has come up with the most elegant solution at this time, which is a quick click-press from off giving you full maximum momentary output.
Actually, the beauty of this setup is that you have two momentary options available at the same time. From off, just a press and you will have simple momentary available at either the last level you used, or your forced-on level (depending on whether you have the force setting on/off), or if you want maximum momentary, just a quick click-press and you have that too.
So, while not exactly what you asked for, it does come pretty close. I'm continually amazed by the flexibility of the NovaTac's UI, and while not perfect, it comes the closest to being able to provide almost any combination of low/medium/high we can come up with.
Good solution Oddjob, and thanks Robin for alerting me to this thread. BTW, I will keep thinking about this to see if I can come up with something even more elegant, but this seems like the logical setup to me.