Certainly not my experience with an advancer, nice improvement in the bottom end, still really smooth, I love the way the bike can pull from 30mph in 6th gear fully loaded. I can only think yours is slightly out of tolerance?
Mine is also the same CCDF rotor which you have. Instead of filing it, I gave it a very light tap with a hammer and it fits very snug. Did you file it on the left or right side? If on the left the advancing might be little more than 4 degrees?I am going the other way as you, the ignition rotor was the first mod, the rest is being done at the moment. On the stock bike it was very smooth at low rpms, I will update here once I've got the full monty done which I'm almost finished with.What difference does it make if the rotor is magnetic or not?