I Created A Mod/software To Directly Control In Game Trains Using A Joystick (no Raildriver)

You are correct about the about setting steps /notches, the value is now steady although the levers do jitter a little still but Im not looking at them mostly. Yeah with smoothing you will lose a little bit of accuracy as a trade off, maybe a slider that can increase / decrease sensitivity but I understand if this is not an issue for others I dont expect you to spend any time on that.

Using the second profile did work but it comes with issues for me at least, because I have pulled the internals out and installed them in different casings if I want to invert a control I need to it in the individual profile rather than the calibration profile which is fine really but just one of those thing's you notice.

The real issue for me is the Arduino button box, because you can only calibrate one and it saves it to both I dont think it would work for my setup. The button box has 8 toggle switches, 16 momentary switches, 2 5pos rotary switches, and 2 latching switches, one of these is an led that lights up when latched. It uses one Arduino Mega which converts to 2 devices in Windows but when calibrating in your program it saves the first calibration to both devices, I dont think I would bother setting up different profiles for this unless it was maybe in sync mode and the profile being generic for all trains.

Again these are really only problems for me and I dont expect you to change the world for me, if no one else is having the issues I will happily work around them.