Hi all - this is my first post, so I'll start with a really quick intro before seeking some advice from fellow members. I'm 58, and have just returned to biking after a 35 year hiatus (I currently have a YBR 125). In my youth, I rode a 125cc and never ended up taking by bike test; however, I'm well into the process this time around and have completed my CBT and theory test so far. Next week I have some intensive training booked on the school's DAS bikes before taking my MOD1 at the end of the week, and - hopefully - MOD2 the week after. Once I've passed I have a quite short shortlist to test, but really my heart is set on the T100 Bonneville, which I've been sitting on and fondling lovingly for a while now. Anyway, on to my question. I have two helmets - an Arai Axces 3 full face, and an AGV X70 open face (the latter for poodling around town rather than for journeys on the open road). I'd originally wanted a Davida open face but couldn't get them on/off without near tearing off my ears; the AGV is a beautiful fit, but sadly I didn't do enough research regarding visors before I bought it and, as glasses wearer, I have some limitations in terms of fixed visors as helmet removal with glasses in situ can be a bit hit and miss. I'd really like to buy the Davida GOV or JPV visor, but unfortunately my helmet has studs on the front. Has anyone used either of these visors on a studded helmet, and if so how did you find it? I'm concerned not only about ease of use, but also about the studs potentially scratching the polycarbonate lens. Many thanks in advance for any help you guys can give me.