By creating a new thread instead of replying on one or more existing, I'm going to try and at least bring a specific idea forward regarding custom difficulties. On repeated plays I have felt the desire to be able to meld certain aspects of each difficulty and I'll bet I'm not alone. One possible way of handing custom difficulty - instead of toggling broad categories on/off - is to work in sliding scales and break down categories. The three existing difficulties are great reference points as