tried to get hold of you just before Christmas to ask, what your experience with the C3 is - I understand you use one, so you could advise what to use for size.
Unfortunately you're (always) busy - so I listened to Patrick and Chris and ordered XL, although my measurements put my exactly into L in your Schuberth chart..... - P+C where quite insistent on going up one size, I hope they are right! :)
So, what fits your noggin'? Is your helmet 1 size up from the chart?