I once bought a 6 ft. Med weight tufline disk.
It was a great disk, very well built, however, my problems started when I tried to use it with my TO 35 ferguson tractor.
The disk was too heavy and when I picked it up the front wheels would just kiss the ground and I had to steer using my brakes.
So I sold it and bought a atlas 300 6ft. Disk it works much better with my tractor.