Does anyone here use Pferd's cs-x chain file system? I just picked one up and just tried it out. My chain is a stihl rsc. This is the first time it has been sharpened, it only has 1.5 tanks of gas on it. It seems to have done a good job on the cutter tooth but didn't even touch the depth guides or rakers. In fact, it seems like the flat file is nearly .020" away from making contact. The file is the correct size and pitch for my chain so I know that is not the problem. I am also sure I am using it properly. What have you who have used these seen? Is this normal?