I am new to making sausage but definitely like doing it, but I am having some concerns when using the KA mixer with the meat grinding attachment. I have put the attachments into the freezer to make them cold and also put the meat that I grind into the freezer r about 45 min before use. The problem that I am seeing is that there is a discoloring of the meat right where the aguer comes thru the grinding plate. The meat there has a black color to it. It is not alot of the grind that gets that way and I only see it when I scrape the last of the grind off the end of the plate. I discard anything that is discolored. Is this normal? I read somewhere on this site that someone else had a similar problem. Can't say that I really like the KA when used to grind and I am willing to get a better grinder if it helps but I don't want to go thru the expense if it isn't going to make a difference. .