Hi there,
I just recently ordered a helmet online and it looks very similar to this picture
I plan to grind the nasal guard to be penny round. My question is "Will the top of the helm be legal?" I don't see any rules stating that is should be illegal. Galin tells me it's illegal, but I would like other opinions. I think he considers the top of the helm a "protrusion" but I consider the nasal guard a protusion. It is conical and rounded, but not quite penny round. The crease at the very top is probably about 40 degrees. It isn't a sharp edge of steel, but two plates welded (I think) together. Would the crease fail due to this rule:
3.1.8.3. The radius of any rigid metal corner must be greater than the radius of a penny.