Began filing the up elevator stops so that the L & R elevator horns make contact evenly against the stop. Rather a slow process—file a bit, stop and measure, file some more. Don’t want to take off too much, lest I would have to rivet on a new stop angle and began the process again. At present, I have up elevator of 27 degrees. The manual shows up elevator should be 25 to 30 degrees. I may take just a bit more off and shoot for 28 degrees.