Thanks for this guys, I didn't expect to be right , I also didn't expect to be wrong by one or perhaps two orders of magnitude!
We're dealing with manual trim only at this time. The auto-trim feature may come later when someone with more autopilot modelling skillz than me looks at it.
I'll set it to 40 for the full range for now.
Sorry for the late response, its been a helluva good new year :-)