Here's my solution to prevent leaving my ROPS up when parking my Kubota in a standard sized garage. I had a 12" x 24" banner made at the local print shop. It has a grommet at the two top corners. I used self tapping screws to mount it to the garage door, about 2 feet above the floor. It hangs flat against the garage door when closed, but when open, the banner hangs down so it's in my face when pulling into the garage. My ROPS is about 2 inches too high to clear my garage door. Cost was $8.00 in June 2021.
Good idea, simple yet effective. That looks like something I'd have to do if my garage didn't have 12x12 door.