Ben, my extra special balanced at the 2.5 inch mark on the wing tips with the 3W 60 i used a pull pull set- up
I do not think I am going to be able to move anything to get it back any further unless I add weight or maybe a smoke system I have been thinking about using some old servo cases in the cutouts to obtain a 3-3.5 inch balance but for now It will do me just fine where it is I have just finished initial break in on my motor and all is truly great with plane I have been doing only basic imac patterns and such no flat spins and I really do not think It will do them with the c.g where it is now but then I have not tried it yet, good luck