I can't get the game to assign an axis to the handbrake. It looks like it does in the controls settings screen, but then when you get out onto the track it doesn't work. button works ok, but sometimes I like to squeeze the handbrake a little while trail braking, just to shift the brake bias back a little. I can't do that with an on/off button. I'm using a Logitech Extreme 3D non-ffb joystick and trying to assign the handbrake to the throttle slider. It worked fine in S1.

Well, you can't use both a button and an axis for the handbrake. You should select either axis or button in the 7th control option from the top, called Handbrake to tell LFS what input to use, the button or the axis you assigned as Handbrake.

and in the axis view, if you dont see anything moving when you move your 'handbrake' then you need to recalibrate all the controls so it recognizes it too