The m2.5 screws with the dome heads, 10mm I think that are used for adjusting the azeron are awful, day one and several of the heads have burred and cannot be loosened, these screws are way too soft to be used for this application. With the what this cost I expect better than this, I cannot use the product now until I get someone to remove these screws, then I am probably going to have to replace all the screws so it does not happen with the remaining ones.