That loads up ok. Normally the .csv is all lowercase, but it worked ok on my test unit with .Csv.
Using only a latch on the left analog up and just a normal for left analog down needs some changes.
I would recommend adding:
left_joy_up, normal, up
left_joy_up, force_off, down
joystick_dead_zone_shape, normal, 0
This will let you use the center puff latch to turn on the cruise control, and then you can steer left and right without holding the stick up.
Moving the stick up or down will clear the latch and let you have direct control of the movement.
Setting the deadzone shape to a square is important to decouple the up/down from the left/right since with a circular deadzone it is impossible to have purely left/right without a tiny bit of up/down which would mess up the latch.