I am so sorry to hear that you don't like your double K's. I'll be honest though, I haven't liked mine nearly as much as I thought that I would either. Thought it was just me. Mine aren't tracking, they do clip clean when they're working. My blades jam up after a few strokes. I get out a fresh clean pair, go to clip and even though the motor is running, the blades aren't cutting. I just ordered new blades and I will change out that lever to see if it makes a difference.
I also do not like the bulky cord. I have a couple of very tiny horses and it is virtually impossible to do their bellies with the Double K's because the handpiece is too long and I can't get it between them and the floor.
I have 6 that need clipping right now. Whoever it was that posted that they were waiting for their horses hair to grow out, don't wait, come to my house.