Okay..
I was playing around with the settings on the Million God pachislo I just picked up.
Changed difficulty level... closed door.. played for a while...

Was going to go in and change difficulty again.. and the lock mechanism is not working when the key is turned to the right... ughh.. what happened.

So after doing research.. there is a hole in the bottom. I saw some pics of other models of machines and there seems to be a release latch if you reach in...

BUT...

I have a plastic insert in the machine that fits over the hole... I pulled it out once and was looking at it - thinking 'what is this for'
So... what is it for?? Is it to prevent someone from reachin' in and opening the door?

Kind of annoyed right now.. not sure how to get this thing open.