As most people will tell you on here. Helmets should never be brought online as you just don't know what you are buying, And all helmets feel differenet on different people, so go into a shop and try all the ones you like on, if you don't find one there thats perfect, move on. In your CBT the instructor should have told you how to make sure a helmet fits correctly. As for pinlocks the following is quoted from dimmers "they are about £20, and they can be swapped between the same make of visor quite easily. You just need to ensure your current visor has the holes in place to accomodate a pinlock. these guys are pretty good (http://www.racevisors.co.uk/category/pi ... or-inserts), don't know if they are the cheapest, but they have a wide selection, as you have to buy a pinlock visor specific to the helmet/visor you currently have. So if you're are intending to buy a different brand/model helmet in a few months then you may will need to buy a new pinlock insert. (just Google 'how to fit a pinlock insert' and you'll get loads of youtube clips on the subject " Hope some of my newbie advice helps