(1) Be a more visible leader of safety initiatives. It's important that employees see you as the action person who does not let safety issues go unanswered. Your response to issues helps build trust in the process and the overall efforts put forth by the safety department. (2) React quickly to safety issues / concerns that are raised. You don't want to be considered a black hole when it comes to safety. Employees that raise concerns want answers.
Yes they do. Any circular saw should have the size right on the saw some where. Standard is 7 1/4  NOT 7 1/2 For wood cutting blades 7 is standard for concrete (Masonry) or metal cutting blades. I guess you are in the UK or somewhere then. The 165 mm is equivalent to a 6 1/2  saw in the states. That would be the standard size for a cordless battery operated circular saw here.
1 Cut bevels steeper than 45 degrees on a tablesaw. 2  None of the techniques you can use to cut them with a circular saw are particularly safe or accurate with angles of more than 45 degrees. 3  Make sure your blade is sharp, and replace it if it isn't. 4  If you cut with a dull blade, you'll chip, gouge or burn the wood.