Ok, I have never done this before so don't laugh

....I always wanted to make my own design and with Dave's help answering my questions about the CAD software I was able to draw up some plans. I wanted to make a very small & light plane based on the glh(and to be very fast). So far this is what I got....the wingspan is 14"...the fuse is a little under 12". What you see so far weighs in at .6oz. And yes I want to try a black widow on it. I know it will be a lot of engine for it, I think I can get the total weight around 6oz(I hope). I am concerned about the balance as well as the wing loading(the wing is only 42 sq in), if I calculated at 6oz AUW the wing loading would be 20.58oz.
I know the people on this forum have a lot of experience with designing and building and I wanted to see what you thought and if I am way off base with this idea.
thanks
-Bill