I feel like there was a really easy answer to this problem - Ask the location!
Or, if the game has a phone number on it, give them a call!
In most cases, a location that is told what you are doing will approve it and then not freak out when they see you doing it. Many companies actually answer the phone today when you call too.
Probably five years ago, I was at a location that had a MM that was barely playable. I called the operator, who is sort of known around my area for not really caring about their machines. The guy answered, I explained the issue, and he said that he unfortunately couldn't get to it that night because the location closed in 30 minutes and he was more than 20 minutes out, but he would go first thing the next day to fix it.
I happened to be in the area the next day. He did.
Most operators are FAR more responsive to issues than people give them credit for, and want their games to be good. If I would have called them and said hey, this game is super leaning to one side, I bet they would have given me permission to level it once they knew I wasn't an idiot.
And the location will know this too. Location games are more or less co-owned between the location and the owners of the machines. If you ask someone, they'll know if it would be a yes or no to fixing it.
While I'm sure we're all altruistic on here too, I do know of cases where players have jacked up the front leg levers on machines to make them play much slower so they can theoretically play longer. Stuff like that definitely does and should give owners pause too.