I put a drop of removable loctite on the broadhead threads, works a little better than wax for keeping them tight. Left wing or right wing should not matter with the bows that were listed. I have found that with Hill style longbows using wood shafts that there can be a slightly better arrow launch with left wing on right handed bows and that can be tweaked a bit by rotating the nock. However, you need to decide in advance if you are going to rotate the nock, as it will turn your grain.