I am in the process of building a 4*60and I saw that the rear section of the plane seemed to be way overdesigned as far as stucture is concerned so I proceeded to lighten it up by cutting out a lot of wood that in my opinion was not nessesary. I cut away some of the wood from the framwork of the stab and fin. and covered it with 1/32 instead of 1/16. also I cut away some of the liteply that made up the rear of the fuse. It is not completed yet so I don't know yet how much good all this will do but I hope this will eliminate having to use too much lead in the nose. I am an experinced builder so I'm not going at this blind but knowing that too much material in the tail section will cause it to be nose heavy believe this will help while leaving enough stucture to keep adequate strength.