If you need more counter weight here is a neat trick.  I added 1 ½ inches to the top of the rudder and stab.  This allowed more volume in the rudder forward of the hinge line thus no lead bars were needed on the rudder leading edge and a greater moment arm on the top of the rudder allowed for a lighter  balanced rudder. An additional benefit was the additional rudder authority I had which saved our bacon on a 24 knot crosswind component landing at Jackson Hole, WY. Beautiful cross controlled landing, greased landing without any difficulty. I used shaped foam covered with two bid glass then hollowed out the foam on the rudder then filled it with lead and drilled to balance.

Bob Smiley

 N94RJ

Back in the days when folks at Lancair still knew what a 320/360 was, I called them to discuss rudder balance since the install manual was not particularly helpful(understatement). When I suggested there wasn't much benefit to adding weight along the leading edge between the hinges, they agreed and recommended that it all go up on top and forward. I ended up extending forward the notch at the top of the VS to accommodate the weight.