Thanks for the fast reply. I think you are right. The range is currently - 100 to +100 (instead of 0 to 100). I have installed open tx 2.3.6 and can see those ranges in action when the sticks are moved but I can't figure out where to change the range to 0-100. Anyone have any info on this? Is that doc you sent me pictures of screen areas in open tx, or are they pics of adjustments made directly on the controller (as the Radiolite 2 does not have a screen...). Thanks again.
I found this manual for the BetaFPV Literadio 2:
However it doesn't mention anything about whether any setup adjustments is possible regarding the endpoints. My suggestion would be to contact BetaFPV directly and ask them if/how you can change the settings.
(FPV Freerider can only read what is coming in through the input manager. The input is shown as the little circles above the OK button as you go through calibration in Freerider. Ideally you should be able to move the little circles smoothly up and down between the lines on the left which marks the max/min value.)
(And yes, the pictures in the document I sent in the earlier reply is from what is seen directly on the screen of the transmitter itself, in this case a Taranis X9D).