I snuck home for lunch, and instead of eating the food I got ready, I worked on the tricopter some.
Of course, if I did something smart, like paid more attention to the directions available online, this might be an easier process, but noooooo. I go my own way.
Anyhow, now it's working, mostly. I seem to be getting the right responses from the roll and pitch, but yaw is being weird. The servo now kicks hard to the left and won't respond to right turn input, but does respond to left turn input.