Button 1 is the one you press to start the fade. Off value 0, on value 127, super control, knob 1 and 2 below are sub controls, options as sub - snap to value - up to 16 sec (max value). Default value - off
Knob 1. Enso Fader knob - set up so the Maximum value is full fade (prolly midi min of 127, midi max of 0, but depends on the Enso). Default value - 0.
Knob 2. Intermediate knob - two ticks, min 0, max 127. It has one sub control - button 2. Default value - 0
Button 2. Enso Stop Command - this has the stop command as the on value. Choose send on only. Default value - off
Button 3. This is the reset button. On all four controls above, select button 3 off sets to default. Choose a dummy command for this button, like Sysex with no values.
Press button 1, starts the fade, sending the knob 1 values. At end of fade, knob 2 toggles, sending the button 2 command to stop the looper. Double press button 3, all are reset for next cycle. Knob 1 sends the min value, which is zero fade. Since button 2 is send on only, it does not send anything on reset.
Knob 2 & Button 2 ensure no command is sent from the stop button on reset. A button can have send on only, a knob doesn't.
You could make an additional sub control of knob 2 to send the clear command. Same sort of setup as button 3.