You'll be just fine with a 5 ft. You want to be wider than the tractor to cover your tracks so I would definitely not get a 4'.Does a 3025 run a 5ft tiller fine in most situations. I know it will depend on soil and if it’s a new plot. I am asking for people who have used them and if it worked out on for you. Or should I be looking at a 4ft. Thanks.