Hey Peter, we take the easy approach and crash em off... only half kidding...:black_eyed:
Don't recall seeing a set screw but will take your word on it - So far the process has been; remove circ clip, find circ clip, discard circ clip, order more circlip. Same with plastic washer which requires prying off gently with small tiny screwdriver, catching the anti-gravity plastic washer, hunting on the floor for the invisible plastic washer, come to understanding that your WAY too old to find said plastic washer, go to computer and order more 20 dollar motors online, go watch tv.
IF however you do manage to find, keep, remove, plastic washer and circ-clip, a very strong tug should lift the housing (and prop) away from the windings. What I don't know is if the pin is a press fit or glued into the housing.