I would like to add one suggestion, if I may! I fly mode 1 - throttle and roll on the right stick, with pitch and yaw on the left stick. In the calibration screen, you have set up the instructions for mode 2 - you instruct the left stick up down calibration then link this to throttle. It's not a problem for me - I move the right stick instead, and everything works as I want, but maybe you want to emphasise the control being calibrated rather than the stick on the Tx. I realise I am in the minority (in the UK at least!), but I understand that there are other modes in use around the world which may have the same issue.
It's a great simulation, and this issue does not spoil the enjoyment of using it!