Took a few seconds to see how the winblock could be reached then some pleasant anticipation which was rewarded by an amusing finish.
Not sure why but the mechanism doesn't work if the other balls are in place? If B drops the mech ball 1st, then the mech works but it will not work after the top ball falls. I know, the game has it's own mine.... BTW, after 4 run thrus and the mech not working, I gave up.
@gmacpro I could be wrong, but it seemed like Spoiler The claustrophobia slider needed to be raised for the mech to work. Not sure though as I have not peeked under the hood with Studio.
@Don G Rowe - The mechanism works at the start if the mech ball falls 1st. I even cycled the lift and once the mech didn't work but it did after that three times so I'm still guessing device issues or own mind.... I didn't look with MekoStudio.