A friend who has had a long career in excavating and earthmoving was admiring my new bota, and told me to be sure to pay attention around branches. I've broken off quite a few with the ROPS already, but he pointed out that a big unbreakable branch can catch on the ROPS and flip the tractor on its tail. Not so likely with my 3560 which usually has a blade on back, but apparently pretty easy with lawnmowers. I hadn't thought of that, and I didn't ask him how he knew...