Im wondering what technique people used to taper the side window framing when building the 1/4 scale Citabria. After the 1/4” sheeting is added to the lower fuse, vertical pieces are added to the window frames including the horizontal frame on the top of the windows, right under where the wings sit. The pieces are 1/4” thick and must be tapered from 1/4” at the bottom to nothing at the top. So in the photo, the space under the ruler will be filled with the tapered balsa member. It seems real cumbersome tapering the horizontal piece on top because nearly all of it needs to be shaved away, and be flush with the vertical uprights. I guess a long rasp will do he work but has anyone had problems doing it without damaging adjacent wood?