I'm looking for any drawings and or written instructions for perfroming a clip wing modification to a J3 specifically for metal spar wings but anything will help. I do not need an actual STC as the aircraft is a homebuilt, however the information would be extremely helpful. I know of a few metal spar STC's but have been unable to locate. Cub Club seems to be on vacation, Univair could not help and Clyde as always was helpful but did not have the specifics. So I leave to the collective knowledge and resources here. Any drawings .calculations or instructions to clip j3 wings would be greatly appreciated. Thanks Tom