How does everyone who shoots open class 3D set the weights on their bows?

I have been tinkering with the weights on mine and seem to be more front heavy than I want to be. I am planning on ordering new front and rear stabilizers and want to have a rough idea of the ratio of the weights I'll need.

I currently am at 24 inches and 8.5 ozs total on the front, I would like to stay there as I seem to like this much weight up front. On the rear stabilzer, which I have offset to the left to balance against the sight, I have a 5 inch 3.5 oz stabilizer installed. In doing my tinkering I have found this to be slightly front heavy, but I am not sure how much weight to put on the back to bring it into balance.

Any help here would be greatly apreciated

Thanks