RE: What "fillers" do you use
Elmers here too the can says "Fill and Finish" light interior wood filler. Speards easy esp if you thin it some with water. dries fast and looks like balsa. It is heavy compared to balsa filler but I don't think it would add more than an once or so to most planes. Seems like Elmers has 1000 kinds of wood filler but I think they are all mostly the same.