I have a 78" EA box blade on my DK40se, only have about 15 hrs on it, so far it has worked great. I don't remember which version I have and I won't be able to check until Friday. I put a level on it to help me with grading of our road, T-N-T really helps being able to fine tune the leveling on the fly. The only change I would like to see is a little more distance between the frame that holds the scarifiers and the back plate that mounts the cutting edge. When cutting level all is fine, but when I cut at a angle to put a crown on the road, dirt gets jammed between frame and the back plate and doesn't flow well to the other side. I have also had a few occasions where I wish the BB was a little heavier to dig in better, just means I have to take another pass. For the value.. the EA BB is hard to beat.