I am planning to purchase a KK rotary tiller, but not sure which size to get. I have a Kubota L4400 which has 37.5 PTO h.p. and the manual recommends a 5' tiller with a max weight of 770 lbs.
The KK 60" is 690 lbs. and rated for 25-40 PTO HP and the 72" is 780 lbs. and rated for 35-50 PTO HP...