Baldilocks, Carbon 1 l tank i bought from JT7 (Jorde Tarres company).
r2wtrials, yes they flex. i'm using carbon mudguard in front for 8 monthes, bent it few time very hard and there is just hardly visible small crack. But with rear is different story, bent it cracked on first day of trial and after that it look horrible in 3 places but i put there small stickers and it is good looking again.... will see how long rear will last.
EdHolland, no i didnt weighted all of them, i knew that carbon is a lot lighter then aluminium and even then plastis. on JT7 web site there is some weigts for some carbon parts... i weighted only Titanium bolts and they are all is about 750 gr, original steel is about 1600 gr.