So, I pulled my TB off tonight to switch the direction my valve moves... I got it now where higher step count is more open, which is higher RPM. It was backward before (just switch one coil polarity if this happens to you). 0 steps is all the way closed (after homing to the closed position). It bottoms out on the other side, all the way open at around 230 or so.

One thing I noticed:

From the manual:
"Start Value - This is the number of steps the valve will move (in the closing direction) on boot so that the rest of the code can rely on the start position being accurate."

I did not realized this was the home move distance parameter until tonight. I went ahead and set mine to 255 for now, and I'll drop it down to the max I end up letting the PID use in closed loop mode.

The value the motor "starts" with is from the cranking steps curve.

If "start value" is left too small, it may not fully reset back to 0 on next key on, and you'll be really confused probably.

It is too late to run mine tonight, but I'll give it a shot tomorrow night hopefully. On my drive last night, I underestimated how important a decently tuned idle is when driving around. Got some strange looks in my neighborhood doing 400 rpm and clunking to a stop at every stop sign.