Afaik, the flap lever in the MU-2 is not an axis but it actuates microswitches.
Do you want to use your hw axis to act the same? E.g. for values 0.9-1 Flaps are up, for 0.7-0.8 flaps 5, 0.4-0.5 flaps 20, 0-0.1 Flaps 40?
And nothing changes with the values between, e.g. 0.6?