I have a K.K. angle frame lift disk , think it is like 6' or 6.5' . Although it is solid , even with all the adjustments , I was not happy with the finished results after several years of use and experimentation . Eventually ended up , swapping the front axles side to side , so all disks now cup inwards , added steel to move the mount points for the front axles out , so as the disks would not to be inline with the rear disks and added close to 600# in weight . Darn thing now will cut down till the axles are pushing dirt .
Depending on soil type , You may not see much result with just one pass but with each subsequent pass , disk will cut deeper and cut up soil more . I make first pass , turn around and go right back over same area . Turn around and move over 1/2 a row and keep going that way , especially on unturned / non-worked soil . Box Frames are around 200+ pounds heavier than the angle , so if you felt more weight was needed , a simple solution I first had was an old 40 gallon well / water pressure tank . Couple of ratchet straps and fill as desired .
Angle of Attack will also make a huge difference , the greater the angle of the disks from front to back , the more it cuts . If standing at the front of the disk looking back , the disk axles go straight across , not much of an attack angle , were as if they are angled to max adjustment , better first pass results . Look at picture on right , if the outside of that front axle was moved all the way forward in the frame , it would have a very aggressive cut . I also run with notched front and back .
Fred H.