Hope all is good. Trying to find a replacement visor for my AGV is proving tricky as my son remove all the labels from it and I don't have a clue what type it is and now there are no AGV stockists in this part of the world to have a go see... so thinking about a new one.... last one I think I've had for +6 years. I have a rather large head and finding a helmet that fits has been a bit of a challenge. That couple to the fact that this is only the second one I bought. So when trying on a new helmet and thinking about fit what are the points to keep in mind? Thanks for your time. Hj