Cpl.upper Section (Fueltank dummy  incl.new especially for this new designed Fueltankdummy ,a new Airbox ,the real Fueltank + Tailsection and subframe) is finished.When i add the weights :

1:Fueltank dummy 900 gr  (1.980  lbs)
2:Airbox                440 gr  ( 0.968 lbs)
3:Subframe            560 gr  (1.232 lbs)
4:Tailsection           820 gr  (1.804 lbs)
5:Fueltank            1500 gr  (3.300 lbs)
Total                    4220 gr   (9.284 lbs)

You can express it many ways now,maybe:whole assembly is 2.5 kg (5.5 lbs) less than only the std. Fueltank.Or 800 gr (1760 lbs) less than only one std.Can.Or: hah-much better:

THE WHOLE ITEMS MENTIONED ABOVE  TOGETHER HAVE NEARLY SAME WEIGHT AS YOUR STD. BATTERY !

A Note:it's no Problem for me to copy the std. Fueltank in Carbon , Carbon/Kevlar or whatever,but it's a Question of how much you're tired of Life.Who already had a crash will know.I've got many Inquirys here in Germany from all the crashed guys ,the've damaged the Fueltank first ( 50% is caused by the crap shape).But even if you choose a maybe 8 cm smaller shape in width the risk will stay-and you'll burn.That's because there is a chance still sitting or be in contact with the Bike while the Fueltank hits the Ground-Carbon will tear up then.

So-where i've located the Fueltank (in the area below my Carbon Subframe),the Fueltank is really protected by mainframes brackets where you normally fix your std. Subframe.So if shit must happen you must be far away from the Fueltank,because before theres no chance the Fueltank can be damaged.

Maybe today i demould the first Fueltank-when i've got all spots for fixing you get the Pics.