I just had to break in a new cam about 6 months ago. My son was using the 40 as a daily driver (his f250 was non-op) and a lobe flatted out. Breaking it in was as much work as putting it in. It was a direct replacement for the Comp Extreme 262H that I had but since i was running dual comp springs on my roller rockers, I had to remove the inner spring on each valve, adjust valves, break in cam, again remove each valve spring to insert inner spring, and readjust valves. Just another life memory. When I make videos, I find it easer to just make and post as a YouTube video link.