I am sure you can find lots of written information on fly rod balance and you will get some good advice here. There is also some great information on balancing your rod in RodMaker magazine. I like my rods just slightly tip heavy as it sounds like you rod is. I just find this to be a more comfortable feel for my casting style. I would suggest that your rod should not be overly tip or butt heavy, otherwise, it is up to you. I feel it is more a feel and not an exact science and I'm a scientist.
Oh well, my 2 cents.
Dr Bob
Bob Widmaier
My biggest fear when I die is that my wife will sell my fly fishing gear for what I told her I paid for it!