The CG feel is different for everyone. I like to pull a 45 and it not drop. I like to roll inverted and not need much push. very neutral. Some people are completely different and like different feel. To each his own. We started at a CG of back of wing tube and have gradually made it out to 1.5". 1.5" feels great to me but could feel sensitive on elevator to others. With the cortex and 1.5" I love it. Start at .5" behind and see what you like.
Scott