Accelerated Checkbox:
When Accelerated is ON the Endless MIDI only goes the maximum. (when reverse is OFF, 0.00, when reverse is ON 1.00) It does not respond to the opposite action. So you can increase the volume but not decrease it, or the opposite if reverse is ON.
Direction Checkbox:
Maybe I setup something wrong, but it seems like the reverse checkbox is, well, reversed for endless lol. When reverse is OFF, a MIDI signal with value of 127 makes the endless value to decrease, while if the MIDI signal with value of 0 makes the endless value to increase.
I will keep testing.